It is know that a box of 600 electric bulbs contains 12 defective bulbs. One bulb is taken out at random from this box. What is the probability that it is a non-defective bulb?

Explanation

Out of `600` electric bulbs one bulb can be chosen in `600` ways
`⇒`Total number of outcomes `= 600`
Number of non-defective bulbs `= 600 -12 = 588`
`⇒` Number of favourable outcomes `= 588`
P(Getting a non-defective bulb) = No. of favourable outcomes÷Total no. of outcomes
`⇒` Probability `= 588/600`
Hence, the probability of getting a non-defective bulb `= 0.98`