Question

A box of 600 electric bulbs contain 12 defective bulbs one bulbs os taken out at random from this box what is the world probability that is a non defective bulb

Answer 1

A box contain bulb=600

Defective bulb=12

Not defective bulb=600-12=588

P(not defective bulb)=588/600

=49/50

Answer 2

Total no of outcomes =600

Probability of getting non defective bulb =

600-12

=588

Probability of getting non defective bulb =no of favourable outcomes / Total no of outcomes =588 / 600 = 49 / 50