Question

A:Assume that when adults with smartphones are randomly​ selected,56​%use them in meetings or classes. If5adult smartphone users are randomly​ selected, find the probability that at least3of them use their smartphones in meetings or classes.

The probability is?

B: A survey showed that 72​%of adults need correction​ (eyeglasses, contacts,​ surgery, etc.) for their eyesight. If 9adults are randomly​ selected, find the probability that

at least 8of them need correction for their eyesight. Is 8 a significantly high number of adults requiring eyesight​ correction?

The probability that?

C: based on a​ poll, among adults who regret getting​ tattoos,23​% say that they were too young when they got their tattoos. Assume that five

adults who regret getting tattoos are randomly​ selected, and find the indicated probability.

a. Find the probability that none of the selected adults say that they were too young to get tattoos.? 4 decimal places

Answer 1