Question

defective pens are accidentally mixed with 132 good ones. It is not possible to just
look at a pen and tell whether or not it is defective. One pen is taken out at random fom
this lot. Determine the probability that the pen taken out is a good one.
A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at random for the lot.​

Answer 1

Answer:

4/20 is the probability for getting a defective buln

Answer 2

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