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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closed as off-topic by Meta, BruceET, Claude Leibovici, N. F. Taussig, USER91500 Oct 4 '15 at 10:12
This question appears to be off-topic. The users who voted to close gave this specific reason:
The probability that the orange is not rotten (good) is $1 - 0.06 = 0.94$. Hence, we know that $0.94$ times the total number of oranges ($150$) is the number of good oranges, which numerically is $150 \times 0.94 =141$.