+0  
 
0
88
2
avatar

If you were to pick two students out of a class of 7 girls and 6 boys, what is the probability that the students chosen are a boy and girl?

 Dec 23, 2020
 #1
avatar
+1

Nevermind, I solved it.

My solution:

The odds that the first student you pick is a girl is 7/13. The oddd that the secound student you pick is a boy is 6/12=1/2. So the you have to multiple 7/13 x 1/2 = 7/26. After that you have to multiple everything by 2! because the order doesn't matter and you get 7/26 x 2! =7/13.

 Dec 23, 2020
 #2
avatar+117724 
+1

Another way

 

C (7,1)  * C(6,1)               42               7

_____________  =     _______  =   ___ 

   C ( 13,2)                       78              13

 

 

 

cool cool cool

 Dec 23, 2020

10 Online Users

avatar
avatar