Question

b. A 2017 poll found that 55​% of college students were very confident that their major will lead to a good job. If 25 college students are chosen at​ random, what's the probability that 13 of them are NOT confident that their major would lead to a good​ job? Let a success be a college student not being confident their major would lead to a good job.

Answer 1

Answer:0.124

Explanation:

Using binomial distribution,

p =1-0.55=0.45

q = 0.55

n = 25

P( x=13) = 25 combination 13 x 0.55^12×0.45^ 13

= 0.124