# A bin contains 71 light bulbs, of which 9 are defective. If 6 light bulbs are randomly selected from the bin without replacement of the selected bulbs, what is the probability that all of the selected bulbs are good?

##### 1 Answer

#### Explanation:

There are 71 light bulbs in the bin of which 9 are defective.

So 62 of them are good.

6 bulbs are selected and we want all of them to be good.

So, the good bulbs must come from the 62 bulbs and this is possible in

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This Problem is to be solved using Binomial Distribution.

If a ball is taken randomly from the bin the ball being defective is

The ball not being defective is

The desired event is not being defective.

Let

We expect