A survey of a random sample of moviegoers shows that 40% purchase popcorn to eat while watching the movie. If a theater has 80 people in it, how many people should you expect to have purchased popcorn?

Question

Mathematics

Isabel Jacobson

10 October, 11:37

A survey of a random sample of moviegoers shows that 40% purchase popcorn to eat while watching the movie. If a theater has 80 people in it, how many people should you expect to have purchased popcorn?

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Answers (1)

Know the Answer?

Chana Chase · Answer 1

Proportion of moviegoers who buy popcorn = p = 40% = 0.40

Total number of people = n = 80

The expected number of people who will buy popcorn will be equal to the product of the proportion p and the total number of people n.

So,

Expected Number of buyers = np

= 0.40 x 80

= 32

Thus, from 80 moviegoers we would expected 32 of them to buy popcorn.