It is known that a box of 800 electric bulbs contains 36 defective bulbs. One bulb is taken at random out of the box. What is the probability that the bulb chosen is non-defective?
ANSWER:
Total number of electric bulbs in the box = 800
Number of defective electric bulbs in the box = 36
∴ Number of non-defective electric bulbs in the box = 800 − 36 = 764
P(Bulb chosen is non-defective)
= Number of non defective electric bulbs in the boxTotal number of electric bulbs in the box=764800=191200
Thus, the probability that the bulb chosen is non-defective is 191200.