SOLUTION: Mary's cat is having kittens. The probability of a kitten being male is 0.5. 1) if Mary's cat has 4 kittens, what is the probability that at least 3 will be male? 2) what is the ex

Algebra ->  Probability-and-statistics -> SOLUTION: Mary's cat is having kittens. The probability of a kitten being male is 0.5. 1) if Mary's cat has 4 kittens, what is the probability that at least 3 will be male? 2) what is the ex      Log On


   



Question 869310: Mary's cat is having kittens. The probability of a kitten being male is 0.5. 1) if Mary's cat has 4 kittens, what is the probability that at least 3 will be male? 2) what is the expected number of males in a liter of 6? Thank you and god bless.
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
1) m=.5, f=.5
m^4+4m^3f Expand the binomial (m+f)^4
=.0625+.25
=.3125 the probability that at least 3 will be male.
.
2) Three
.
Ed