A tennis player makes a successful first serve 65% of the time.Assume that each serve is independent of the others.If she serves 3 times,what is the probability that she does not make all of her first serves?
A)0.0429
B)0.7254
C)0.105
D)0.2746
E)0.65

Question

Quizplus · Accepted Answer

The probability of making all first serves in 3 attempts is $0.65^3 = 0.274625$. Since the question asks for the probability of not making all first serves, we subtract this from 1: $1 - 0.274625 = 0.725375$, which rounds to 0.7254, matching option B.

A Tennis Player Makes a Successful First Serve 65% of the Time.Assume