Question

Your mother said you can buy three boxes of Cracker Jacks. What is the probability that you will find one tattoo out of those three boxes? The probability of finding a tattoo in a single box of Cracker Jacks is .20.

Answer 1

Solution:

Given, $p=0.20,q=0.80,n=3$

$X\sim Bin(n,p)$

$P(X=1)=\ ^3C_1(0.20)^1(0.80)^2=3(0.2)(0.64)=0.384$