According to one study, 61% of the population swallow at least one spider per year in their sleep. Based on
this study, what is the probability that exactly 7 of 10 randomly selected people have swallowed at least one
spider in their sleep in the last year?
a. 70%
b. 22%
c. 1%
d. 34%
answer:
B. 22%
thank you.
1 answer