A box contains 150 oranges. If one orange is taken out from the box at random and the probability of its being rotten is 0.06, then find the number of good oranges in the box.

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Solution

Total number of oranges = 150
Probability of it being good =1 - 0.06 = 0.94
Let the number of good oranges be x.
P(getting good oranges) = $\frac{Number of good oranges}{Total number of oranges}$
$0.94 = \frac{x}{150}$
$\Rightarrow x = 0.94 \times 150 = 141$
Hence, the required number of good oranges in the box is 141.

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A box contains 150 oranges. If one orange is taken out from the box at random and the probability of its being rotten is 0.06, then find the number of good oranges in the box.

Total number of oranges = 150 Probability of it being good =1 - 0.06 = 0.94 Let the number of good oranges be x. P(getting good oranges) = Number of good orangesTotal number of oranges 0.94=x150 ⇒x=0.94×150 =141 Hence, the required number of good oranges in the box is 141.