Question

Out of 800 identical articles some are selected and remaining are rejected. If the probability of an article to be rejected is 0·425; the number of rejected articles is ______.

Options

• 340

• 800

• 430

• 560

Answer 1

Out of 800 identical articles some are selected and remaining are rejected. If the probability of an article to be rejected is 0·425; the number of rejected articles is 340.

Explanation:

⇒ P(rejecting an item) = \[\frac{\text{No. of favourable outcomes}}{\text{Total no. of possible outcomes}}\]

\[\Rightarrow 0.425 = \frac{\text{No. of favourable outcomes}}{800}\]

⇒ No. of favourable outcomes = 0.425 × 800 = 340