SOLUTION: a box contains 12 batteries, 9 are working and 3 are defective. if you randomly select 2 batteries, what is probability that one works and one is defectives
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Question 876746: a box contains 12 batteries, 9 are working and 3 are defective. if you randomly select 2 batteries, what is probability that one works and one is defectives Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! 3/12 * 2/11 = 6/132 both defective
9/12 * 8/11 = 72/132 both working
1-(6/132 + 72/132)
= 54/132
= 9/22 probability that one works and one is defective.
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Ed
