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## #1 Re: Help Me ! » no. of functions » 2012-06-29 15:47:36

Thanks friends I have got the definition of surjective function and into function

but How can i solve my questions.

please help

Thanks

## #2 Help Me ! » no. of functions » 2012-06-27 16:38:35

juantheron
Replies: 5

If A = {1,2,3,4,5,6} and B = {a,b,c,d,e}. Then Total no. of

(1) onto function from A to B

(2) into function from A to B

(3) Constant function from A to B

Explanation Required

Thanks

## #3 Help Me ! » probability » 2012-06-10 00:56:37

juantheron
Replies: 3

Suppose two houses in a thousand catch fire in a year and there are 2000 houses in a village. what is the probability that

(i) none of the houses catch fire

(ii) at least one house catch fire?please explain

## #4 Help Me ! » dice probability » 2012-05-22 08:11:32

juantheron
Replies: 86

A and B alternately throw a die....The numbers they get on their throws are individually added......the first person to get a overall sum of 10 wins....what is the probability that A wins the game given that it is the first to start the game

## #5 Help Me ! » another probability » 2012-05-22 08:09:54

juantheron
Replies: 0

A family has two children. Assume that birth month is independent of gender,
with boys and girls equally likely and all months equally likely, and assume that the
elder childs characteristics are independent of the younger childs characteristics).

What is the probability that both are girls, given that at least one is a girl who was
born in March.

## #6 Re: Help Me ! » probability » 2012-05-22 08:08:44

Thanks Bobbym and anonimnystly

Yes Bobbym you are Right

but would you like to explain it to me

Thanks

## #7 Re: Help Me ! » orthocenter » 2012-05-20 01:14:22

Yes John E. Franklin  you are Right

i have also get it

Thanks

## #8 Help Me ! » probability » 2012-05-20 01:02:27

juantheron
Replies: 4

There are 6 couples (12 people). 4 people are selected at random. What is the probability that exactly one couple will be selected

## #9 Re: Help Me ! » no. of digit » 2012-05-14 16:33:28

Thanks Bobbym how can you get it

explanation plz

## #10 Help Me ! » no. of digit » 2012-05-14 15:49:21

juantheron
Replies: 3

find no. of digit in 2^2^(22)

## #11 Help Me ! » perfect square » 2012-05-14 15:47:22

juantheron
Replies: 33

the number of ordered pairs of positive integers x,y such that x^2 +3y and y^2 +3x are both perfect squares

## #12 Re: Help Me ! » sum of digit » 2012-05-14 15:43:10

Thanks member for heavy and Nice discussion

means

## #14 Re: Help Me ! » no. of combination » 2012-05-04 07:16:12

Thanks anonimnystefy

How can I take generating function here

explanation required.

## #16 Re: Help Me ! » no of onto function » 2012-05-04 06:54:26

yes

would you like to explain it to me

## #17 Help Me ! » no of onto function » 2012-05-04 06:42:35

juantheron
Replies: 5

If a Set A consists of n- distinct elements, then total no. of onto function from A to A is

## #18 Help Me ! » no. of combination » 2012-05-04 06:40:00

juantheron
Replies: 27

the number of combinations that can be made by taking 4 letters of the word COMBINATION

## #19 Re: Help Me ! » sum of digit » 2012-05-04 06:30:45

Thanks friends but would you like to explain it to me

## #20 Re: Help Me ! » cardanility » 2012-05-03 07:25:29

Thanks anonimnystefy

got it

## #21 Re: Help Me ! » max of determinant » 2012-05-03 07:10:36

Thanks bobbym and anonimnystely

i want explanation for the line

You can get the exact opposite of a diagonal matrix for that. The main giagonal is all zeros and the rest are ones.

to bobbym

what is Hadamard's bound

Thanks

## #22 Help Me ! » max of determinant » 2012-05-03 06:55:42

juantheron
Replies: 4

maximum value of 3rd order determinant whose element are choosen from the set {0,1}

## #23 Re: Help Me ! » cardanility » 2012-05-03 06:54:39

Thanks anonimnystefy

would you like to explain me the meaning of cardanility

Thanks

## #24 Help Me ! » sum of digit » 2012-05-03 06:51:45

juantheron
Replies: 123

The sum of all the no. that can be formed using the digit

without repetition is

## #25 Help Me ! » cardanility » 2012-05-03 06:30:15

juantheron
Replies: 5

Let S={1,2,3,..........n}.If x denotes the set of all subsets of S containing exactly two elements  having 1 as least element,then what is the cardinality of X

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