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#5726 2018-02-14 01:33:24

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,801

Re: Oral puzzles

Hi,

.

#3921. A child has a block in the shape of a cube with one letter written on each face as shown below:
A  B  C  D  E  A
The cube is thrown once. What is the probability of getting (i) A? (ii) D?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5727 2018-02-14 15:36:07

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,047

Re: Oral puzzles


Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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#5728 2018-02-14 16:52:23

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,801

Re: Oral puzzles

Hi,

The solution #3921 (both parts) is correct. Neat work, Monox D. I-Fly!

#3922. A jar contains 24 marbles, some are green and others are blue. If a marble is drawn at random from the jar, the probability of it being green is 2/3. Find the number of blue marbles in the jar.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5729 2018-02-14 17:29:15

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,047

Re: Oral puzzles


Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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#5730 2018-02-14 19:06:51

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,801

Re: Oral puzzles

Hi,

The solution #3922 is correct. Neat work, Monox D. I-Fly!

#3923. A number x is selected from the numbers 1, 2, and 3 and a second number y is randomly selected from the numbers 1, 4, and 9. What is the probability of the product xy of the two numbers being less than 9?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5731 2018-02-14 19:20:13

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,047

Re: Oral puzzles


Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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#5732 2018-02-14 21:09:54

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,801

Re: Oral puzzles

Hi,

The solution #3923 is correct. Excellent, Monox D. I-Fly!

#3924. Two unbiased dice are thrown. Find the probability of the sum on the dice is greater than 10.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5733 2018-02-15 19:18:56

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,047

Re: Oral puzzles


Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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#5734 2018-02-15 21:12:12

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,801

Re: Oral puzzles

Hi,

The solution #3924 is correct. Keep it up, Monox D. I-Fly!

#3925. Five cards - ten, jack, queen, king, and an ace of diamonds are shuffled face downwards. One card is picked at random. If a king is drawn first and put aside, what is the probability of the second card being picked by the ace?


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5735 2018-02-16 18:10:17

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,801

Re: Oral puzzles

Hi,

.

#3926. From a pack of 52 cards, jacks, queens, kings, and aces of red color are removed. From the remaining, a card is drawn at random. Find the probability of the card being drawn is (i) a black queen (ii) a red card.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5736 2018-02-16 22:39:01

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,047

Re: Oral puzzles


Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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#5737 2018-02-17 00:14:10

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,801

Re: Oral puzzles

Hi,

.

#3927. From a pack of 52 cards, jacks, queens, kings, and aces of red color are removed. From the remaining, a card is drawn at random. Find the probability of the card being drawn is (i) a black jack (ii) a picture card (jacks, queens, and kings are picture cards).


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5738 2018-02-19 00:20:51

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,801

Re: Oral puzzles

Hi,

.

#3928. A bag contains 8 red, 6 white, and 4 black balls. A ball is drawn at random from the bag. Find the probability of the drawn ball being
(a) red or white
(b) not black.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5739 2018-02-20 15:05:01

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,801

Re: Oral puzzles

Hi,

.

#3929. A bag contains 8 red, 6 white, and 4 black balls. A ball is drawn at random from the bag. Find the probability of the drawn ball being neither white nor black.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#5740 Today 00:52:29

ganesh
Administrator
Registered: 2005-06-28
Posts: 23,801

Re: Oral puzzles

Hi,

.

#3930. 12 defective are accidentally mixed with 132 good ones. It is not possible to just look at the pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability of the pen taken out is good one.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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