# Math

posted by .

The local video store has determined that 65% of the store's customers are women. What is the probability that the next 3 customers will be women? Round to the nearest percent.

• Math -

p = .65
(1-p) = .35
binomial distribution, n = 3
binomial coefs for n = 3 are 1, 3, 3, 1
probability of three women, zero men in three = coef(3,0)(p)^3 (1-p)^0
= 1 (.65)^3 (1)
= .2746 = 27%

• Math -

Of course I made this too hard. Since it is the trivial case of all the same, not for example two men and one woman, you could just say 3 independent events each with a probability of .65 or .65^3

## Similar Questions

1. ### Math

A video store sells a certain video for \$32, which is 60 percent more than it costs the store to purchase this video. During an inventory sale, employees are invited to purchase remaining videos at 25 percent off the store's cost. …
2. ### statistics

Find the indicated binomial probabilities. Round to the nearest 3 decimal places. In a local college, 20% of the math majors are women. Ten math majors are chosen at random. 1) What is the probability that exactly 2 are women?
3. ### statistics

Find the indicated binomial probabilities. Round to the nearest 3 decimal places. In a local college, 20% of the math majors are women. Ten math majors are chosen at random. 1) What is the probability that exactly 2 are women?
4. ### psy

Cathy owes six overdue movies to her local video store. Since each of Cathy’s overdue videos is a comedy, only comedies are currently overdue at Cathy’s local video store. Which one of the following premises, if added to the statements …
5. ### Statistics

According to a recent survey, 75% of all customers will return to the same grocery store. Suppose 8 customers are selected at random: A) What is the probability that exactly five of the customers will return?
6. ### Data Management

A store manager believes that 42% of her customers are repeat business (have visited her store within the last two weeks). Assuming she is correct, what is the probability that out of the next 500 customers, between 200 and 250 customers …
7. ### statistic

A survey was made of 100 customers in a department store. 70 of the customers indicated they visited the store because of a newspaper advertisement. The remainder had not seen the ad. A total of 40 customers made purchases; of these …
8. ### statistics

On the average five customers visit a children department store each hour. Using Poisson distribution, calculate the probability of three customers shop at the store.
9. ### Math

In 35 minutes, 49 customers entered the store. At this rate, how many customers will enter the store in 2 hrs?
10. ### Math "Need Help Asap"!

"Find each percent of markup?" 5.)Store's cos:\$26 selling price:\$39 6.)Store's cost:\$125 selling price:\$168.75 7.)Store's cost:\$75 selling price:\$90 "Find each selling price round to the nearest cent?

More Similar Questions