According to government data, the probability that an adult was never in a museum is 15%. In a randomsurvey of 10 adults, what is the probability that at least eight were in a museum?
A) 0.820
B) 0.200
C) 0.002
D) 0.800

Question

Quizplus · Accepted Answer

The probability that an adult was in a museum is 1 - 0.15 = 0.85. To find the probability that at least 8 out of 10 adults were in a museum, we calculate the probabilities for exactly 8, 9, and 10 adults being in a museum and sum these probabilities. This can be done using the binomial probability formula, which leads to a cumulative probability that matches choice A.

According to Government Data, the Probability That an Adult Was