Question

From a total of 10 bulbs 6 bulbs are working. One has to choose 3 bulbs out of them. What is the probability that all
the 3 bulbs will be glowing​

Answer 1

Answer:

2 ,3 or1 can be probability

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Answer 2

Step-by-step explanation:

First you have 10 bulbs.

The probability that the one you choose will be working is 6/10.

Now you have 9 bulbs.

The probability that the one you choose will be working is 5/9.

The probability that the one you chose earlier was working and the one you choose now is ALSO working would be 5/9 of 6/10 i.e. 1/3.

And now you have 8 bulbs.

The probability that the one you choose will be working is 4/8.

The probability that the ones you chose earlier were working and the one you choose now is ALSO working would be 4/8 of 1/3 i.e. 1/6.

Thus, the probability of you choosing 3 glowing bulbs from a choice of 10 bulbs out of which 6 are working is 1/6.