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31 December, 17:13

The ratio of chickens, lambs and cows is 1:2:4 respectively. If the total number of animals is 21, how many lambs are there?

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  1. 31 December, 18:00
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    6

    Step-by-step explanation:

    In terms of "ratio units", lambs make up 2 / (1+2+4) = 2/7 of the total of animals.

    2/7 · 21 = 6

    There are 6 lambs.
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