Question

A carton of 26 bulbs contains 6 defective bulbs. One bulb is drawn at random. If the selected bulb is defective, what is the probability that the second bulb drawn is defective?

• A. $\frac{2}{3}$
• B. $\frac{1}{5}$
• C. $\frac{4}{23}$
• D. $\frac{3}{23}$

Answer 1

The correct option is B $\frac{1}{5}$

The total number of bulbs, in the beginning, is 26.

The first selected bulb is defective.

Number of defective bulbs in the carton is now 5 and the total number of bulbs is 25.

Probability that the second bulb selected is defective is,
$\frac{5}{25}=\frac{1}{5}$