assume that when adults with smartphones are randomly selected, 45% use them in meetings or classes. If 6 adult smartphone users
are randomly selected, find the probability that exactly 3 of them use their smartphones in meetins or classes.
1 answer:
Answer:
0.3032
Step-by-step explanation:
Use binomial probability.
P = nCr p^r q^(n-r)
where n is the number of trials,
r is the number of successes,
p is the probability of success,
and q is the probability of failure (1-p).
P = ₆C₃ (0.45)³ (0.55)³
P = 0.3032
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Divide the numerator by the denominator.
Answer:
90m
Step-by-step explanation:
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