When buying a candy bar, there is a 20% chance that it will also include a coupon for a second candy bar. a student wants to determine the probability that, if she buys 7 candy bars, more than 2 will include a coupon.

0.148

Step-by-step explanation:

Given that

probability that a candy will include a coupon for second candy bar = 0.20

Each candy having a coupon is independent of the other also there ae ony two outcomes.

Hence X no of candies which attract a coupon for second candy is binomial

with n = 7 and p = 0.20

Probability that  if she buys 7 candy bars, more than 2 will include a coupon.

=P(X>2)

=P(x=2)+P(X=3)+P(x=4)+P(x=4)+P(X=5)+P(x=6)+P(x=7)

=0.148

i think is g(1)=-1.

hope that i can