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 det

Question

3 years ago

11

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

2 answers:

nydimaria [60] · Answer 1 · 2022-08-26T00:04:10+03:00

7 0

Answer:

these are the answers -

i took the test theses were the answers -

A1 = more than two 1s

A2 = 0.4286

hope this helped !

faltersainse [42] · Answer 2 · 2022-08-26T01:43:48+03:00

Answer:

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