Question

FAN+MEDAL PLEASE HELP! A group of 8 friends (5 girls and 3 boys) plans to watch a movie, but they have only 5 tickets. If they randomly decide who will watch the movie, what is the probability that there are at least 3 girls in the group that watch the movie?

Answer 1

@Hero

Answer 2

@ganeshie8

Answer 3

@goformit100

Answer 4

@freckles

Answer 5

@Robert136

Answer 6

First, the number of ways you can choose 5 people from 8 is given by 8!/(5!*3!) which is
8!/(5!*3!)


There will be at least three girls except in the situation when all three boys are chosen. The number of ways can you choose 3 boys from 5 people is 5!/(3!*2!) which is
5!/(3!*2!)


So the probability that there are at least 3 girls is (56 - 10)/56 or 46/56 = 0.821

I've assumed you know that the exclamation mark stands for "factorial". That is n! = n*(n-1)*(n-2)*....*2*1

Just in case you are uncertain about the above formulae, I'll illustrate all the possible ways of choosing 3 boys and 2 girls below.
Each column below represents the tickets in the order in which they are drawn.

Answer 7

there u go @alyssagoodm