Question

A box contains 150 bulbs out of which 15 are defective. It is not possible to just look at a bulb and tell whether or not it is defective. One bulb is taken out at random from this box. Calculate the probability that the bulb taken out is a defective one. 

Answer 1

Total number of possible outcomes = 150 

Number of bulbs which are defective = 15 

P(taking out a defective bulb) = `15/150 = 1/10`