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A lot of 25 bulbs contain 5 defective on...

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

Text Solution

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Good bulbs `= 25- 5= 20`
P (good bulb) `= (20)/(25) = (4)/(5)`
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