The accompanying table describes the random variable​ x, the numbers of adults in groups of five who reported sleepwalking. Complete parts (a) through​ (d) below.
a. Find the probability of getting exactly 4 sleepwalkers among 5 adults.
​(Type an integer or a decimal. Do not round.)
b. Find the probability of getting 4 or more sleepwalkers among 5 adults.
​(Type an integer or a decimal. Do not round.)
c. Which probability is relevant for determining whether 4 is a significantly high number of sleepwalkers among 5 adults: the result from part (a) or part (b)?
A. Since the probability of getting 5 sleepwalkers includes getting 4 sleepwalkers, the result from part (b) is the relevant probability.
B. Since the probability of getting 4 sleepwalkers is the result from part (a), this is the relevant probability.
C. Since the probability of getting 5 sleepwalkers is less likely than getting 4 sleepwalkers, the result from part (a) is the relevant probability.
D. Since the probability of getting fewer than 4 sleepwalkers is the complement of the result from part (b), this is the relevant probability.
x P(x) 0..................................0.1620.162
1..................................0.3900.390
2..................................0.2840.284
3..................................0.1350.135
4..................................0.0280.028
5..................................0.0010.001