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. (1 point)
70%
22%
1%
34%

Question

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.  (1 point)
70%
22%
1%
34%

anonymous · Answer

It would be 22%. It's simple math.

anonymous · Answer

P(x = 7) = 10C7(0.61)^7 * (0.39)^3 = 0.22