Question

suppose there is a 0.85 probability that a randomly selected adult knows what twitter is. If...

suppose there is a 0.85 probability that a randomly selected adult knows what twitter is. If 10 people are randomly selected, find the probability that a) exactly 9 know what twitter is, b) 9 or more know what twitter is
Math   Statistics-And-Probability   
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Answer #1

Solution-

Given data,

n=10 ( numby of trails )

P=0.85 ( probability of success)

q= 0.15 ( probability of failure )

Use binomial distribution

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