The probability that a randomly selected individual in a certain community has made an online purchase is 0.35 . suppose that a sample of 12 people from the community is selected, what is the probability that at most 3 of them has made an online purchase?

The required probability is approximately 0.3467.

Step-by-step explanation:

Let X represents the event of making an online purchase,

Given,

The probability of making an online purchase, p = 0.35,

While, the probability of not making the online purchase, q = 1 - p = 0.65,

Hence, by the binomial distribution formula,

Where,

Hence, the probability that at most 3 of them has made an online purchase is,

P(x ≤ 3) =P(x=0) + P(X=1) + P(X=2) + P(x=3)

65

step-by-step explanation:

step-by-step explanation: