Question

The probability of selecting a rotten apple randomly from a heap of 900 apples is 0.18. What is the number of rotten apples in the heap?

Answer 1

$prob. \: of \: selecting \: rotten \: apple = \frac{no. \: of \: rotten \: apple \: }{total \: no. \: of \: apples} \\ \\ 0.18 = \frac{x}{900} \\ x = 0.18 \times 900 \\ x = 18 \times 9 = 162$

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