P(X<3) = P(X=0) + P(X=1)+ P(X=2)
You should have been taught a method for finding the probabilities on the right hand side before being set the question. (binomial distribution, maybe?)
Hey Guys, I need some more help here.
Im not sure how to solve this question:
It is known in the ice cream industry that 38% of people have chocolate as their favorite flavor ice cream.
Let X be the number of people in a sample of 10 who say chocolate is their favourite ice-cream flavor.
Calculate: P(X < 3)