Question

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? Select the correct answer from above options

Answer 1

It is given that Total number of electric bulbs = 800 Defective bulbs = 36 So the number of non-defective bulbs = 800 – 36 = 764 We know that Probability that the bulb chosen is non defective = number of non-defective bulbs/ total number of bulbs By substituting the values Probability that the bulb chosen is non defective = 764/800 So we get Probability that the bulb chosen is non defective = 191/200