Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#26 Re: Help Me ! » Probability » 2011-02-05 12:11:36

I was just curious does anyone know how to do this problem in the way that gAr suggested?

By doing 1 - P(none of the suits are missing)?

#27 Re: Help Me ! » Probability » 2011-02-05 12:03:44

Hey every one yeah I think bobbym has the right approach because that was the answer in the back and we have just started to learn about the inclusion exclusion principle.  Thanks to everyone for their inputs it really helped!

#28 Help Me ! » Probability » 2011-02-04 13:44:17

chineseballer06
Replies: 21

Stuck on this problem.  Any help is appreciated smile

What is the probability that in a player's hand of 13 cards at least one suit will be missing? 

I'm assuming that this is from a standard deck of cards.

#30 Re: Help Me ! » Euclidian Geometry Probability » 2011-02-02 05:09:08

the answer in the back of the book is (h-d)^2/(h^2) 

but i don't know how they got that

#31 Re: Help Me ! » Euclidian Geometry Probability » 2011-02-02 05:05:22

I think I have my picture right, I just don't understand what areas I am supposed to compute.

#32 Re: Help Me ! » Euclidian Geometry Probability » 2011-02-02 04:54:08

Yeah I do need one, I haven't figured it out yet.  Thanks bobbym!

#33 Re: Help Me ! » Euclidian Geometry Probability » 2011-02-01 17:12:11

Okay thanks everyone that helps a lot!! And for the first part I think d is supposed to be the distance from that random point to the base, but yeah I agree the wording on the problem is confusing.

#34 Help Me ! » Euclidian Geometry Probability » 2011-02-01 05:39:30

chineseballer06
Replies: 13

Hey everyone, I have been working on this problem for a few days now and am just completely stuck. Im in college taking a probability and statistics course. 

The problems is: A point is chosen at random inside a triangle with height h and base of length b.  What is the probability that the perpendicular distance from the point to the baee is larger than d?  What is the probability that the randomly chosen point and the base of the triangle will forma triangle with an obtuse angle when the original triangle is equilateral?

I need more help with the second part in setting up the problem because I think I can figure it out from there.  All help is really appreciated.  Thanks!

Oh and the answer is 1/2 + (pi/(6square root 3))

Board footer

Powered by FluxBB