Question

A lot of 25 bulb contain 5 detective ones.One bulb is drawn at random from the lot. What is the probability that the bulb is good​

Answer 1

Probability of good bulb is = 20c1/25c1

20/25 = 4/5.

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Answer 2

Step-by-step explanation:

Probability of getting good bulb is 4/5

Explanation:

Total bulbs=25

Defective=5

Non-defective=25-5=20

Now drawing a good bulb=20/25

20/25=4/5