Question

Based on a poll, 50% of adults believe in reincarnation. Assume that 7 adults are randomly selected, and find the indicated probability. Complete parts (a) through (d) below. a. What is the probability that exactly 6 of the selected adults believe in reincarnation? The probability that exactly 6 of the 7 adults believe in reincarnation is

Answer #1

Let X be a random variable which represent the number of adults which belives in reincarnation among 7 selected adults .

we know 50% adults belive in reincarnation . Therfore

X follows binomial distribution with parameter n=7 and P=0.5

Therfore the pmf of X is

The probability that exactly 6 of 7 adults believe in reincarnation is

= 0.0547

above solution is correct with full explaination so please rate me high .

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