Question

132 good pens 12 bad pens P ( good pen)​

Answer 1

total pens=132+12=144. and total good pens =132. hence, probability of pen taken out to be a good one is 132/144=66/72=33/36=11/13.

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Answer 2

Answer:

total pen= 132+12= 144

good pen=132

P(good pen)=132/144=11/12

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