There are 12 red checkers and three black checkers in a bag. Checkers are selected one at a time, with replacement. each time the color of the checker is recorded, find the probability of selecting a red checker exactly seven times in 10 selections. Show your work
2 answers
algebra 1
prob(red) = 12/15 = 4/5
prob(not red) = 1/5
prob( 7 reds of 10)
= C(10,7)(4/5)^7 (1/5)^3
= appr .2013
prob(not red) = 1/5
prob( 7 reds of 10)
= C(10,7)(4/5)^7 (1/5)^3
= appr .2013
1 answer