Q. 12 B3.9( 9 Votes )

A lot consists of 144 ball pens of which 20 are defective and the others are good. The shopkeeper draws one pen at random and gives it to Sudha. What is the probability that

She will not buy it?

Answer :


Lot consists of total 144 ball pens.

Defective pens = 20

Sudha will not buy pens if pen is defective.

P(Sudha will not buy pen) =

P(Sudha will not buy pen) =

P(Sudha will not buy pen) =

Probability Sudha will not buy a pen is

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