You flip a fair coin. What is the probability that you get 2 heads and 3 tails?
How many times do you flip it ??!!!!
Obviously.... 5 times Right?
There are 32 possibilities such as T T T T T T T T T H T T T H T etc
I believe only 10 will have 2 heads and three tails
10/32 = 5/16
5! / [2! * 3!]=10 10 / 2^5 =5 / 16 =31.25%