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12 August, 12:57

A mint produces 150000 souviner coins each year. In a random sample of 400 coins, 3 have a misprint. Predict the number of coins that will have misprints in a year

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  1. 12 August, 14:35
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    1125 coins

    Step-by-step explanation:

    To predict the number of coins with problem, we assume that for each 400 of the 150000 coins, we have 3 with misprint.

    So, using rule of three, if 400 coins have 3 coins with problems, 150000 coins have X coins with problem:

    400 - > 3

    150000 - > X

    400/150000 = 3/X

    X = 150000*3/400 = 1125

    We predict that 1125 coins will have a misprint.
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