Question

According to an independent report, 85% of drivers wear sunglasses. If 15 drivers are selected, find...

According to an independent report, 85% of drivers wear sunglasses. If 15 drivers are selected, find the probability that exactly 9 of them wear sunglasses.

A recent survey found that 80% if internet searches are conducted using Google. If 10 searches are selected, what is the probability that at least 7 of them are conducted using Google?

Solution: According to an independent report, 85% of drivers wear sunglasses. If 15 drivers are selected, find the probability that exactly 9 of them wear sunglasses.

Answer: The given process following the binomial distribution with

Let x be the number of drivers who wear sunglasses

We have to find .

rounded to 4 decimal places

Therefore, the probability that exactly 9 of them wear sunglasses is

A recent survey found that 80% if internet searches are conducted using Google. If 10 searches are selected, what is the probability that at least 7 of them are conducted using Google?

Answer: The given process following the binomial distribution with

Let x be the number of internet searches conducted using Google.

We have to find

.

rounded to 4 decimal places

Therefore the probability that at least 7 of them are conducted using Google is

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