Algebra
posted by Jon .
During a clothing sale, 1/4 of the store merchandise is reduced in price. Find the probablility that 3 of 5 randomlyselectled shirts have reduced prices.

Algebra 
drwls
Probability all 5 are reduced is
P(5) = (1/4)^5 = 0.000996
Probability that none are reduced is
P(0) = (3/4)^5 = 0.3773
Probability that 3 out of 5 are reduced is
P(3) = (1/4)^3*(3/4)^2* [5!/(2!*3!]= 0.0879
P(1) = (1/4)(3/4)^4*5 = 0.3955
P(2) = (1/4)^2*(3/4)^3*[5!/(2!*3!)] = 0.2637
Respond to this Question
Similar Questions

Algebra
During a clothing sale, 1/4 of the store merchandise is reduced in price. Find the probablility that 3 of 5 randomlyselectled shirts have reduced prices. my guess is to multiply 1/4 and 3/5 but that has to be wrong 
Algebra II
During a sale, 1/6 of the CD prices are reduced. Find the probability that 2 of 4 randomlyselected CDs have reduced prices. How do I set this one up? 
8th grade math
Julianne plans to take advantage of the after Thanksgiving sale to purchase the portable DVD player she wants. She finds it on sale at two different stores at the local mall. JMart advertises the DVD player for $48.00, while Better … 
Math
Signs in a department store read, "75% off original prices when you take an extra extra 50% off already reduced prices." By what percent were original prices reduced before today's sale? 
help(math)
Signs in a department store read, "75% off original prices when you take an extra extra 50% off already reduced prices." By what percent were original prices reduced before today's sale? 
math
Traditions Clothing Store is having a sale. Shirts that were regularly priced at $20 are on sale for $17. What is the percentage of decrease in the price of the shirts? 
7th grade math Ms. Sue last two questions thanks
15. In Store A, a book that regularly sells for $24.99 is on sale at 15% off. In Store B, the same book regularly sells for $27.99 and is on sale at 25% off. Which store sells the book for the lower sale price? 
algebra
the dress store is having a sale where all merchandise is 1/4 off. a woman buys $42 of merchandise at the sales price. what would she have had to pay at the regular price. 
English
1. All shirts are 10 % off. 2. All shirts are on sale, 10 % off.  Are both the same? 
Math
Store a has a promotion if you Bryce three shirts you get 25% off the total price of the three shirts store be has the same shirts on sale with a promotion that if you buy three shirts you get the third shirt on a 50% discount store …