Question

It is known 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?

• A. $\frac{588}{600}$
• B. $\frac{12}{600}$
• C. 0.94
• D. 0.98

Answer 1

Answer: (A), (D)

The correct options are
A

$\frac{588}{600}$

D

0.98

Number of non-defective bulbs = 600 – 12 = 588

Total number of bulbs = 600

Probability of picking a non-defective bulb $=\frac{\text{Number of non-defective bulbs}}{\text{Total number of bulbs}}$

Probability of picking a non-defective bulb = $\frac{588}{600}$ = 0.98