A package of 10 batteries is checked to determine if there are any dead batteries.Four batteries are checked.If one or more are dead, the package is not sold.What is the probability that the package will
Not be sold if there are actually three dead batteries in the package?
A)2/3
B)6/7
C)5/6
D)4/5

Question

Quizplus · Accepted Answer

If there are three dead batteries in the package, the probability of selecting one or more dead batteries in the first four checked is 1 - (1/10) * (9/10) * (8/9) * (7/8) = 5/6.

A Package of 10 Batteries Is Checked to Determine If