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1/3 of the total barn animals were chickens and rest were pigs there were total 20 legs. How many were pigs?

  • Math -

    4P + 2C= 20 (the number of legs), and
    C = P/2 (since 1/3 are chickens)

    Therefore

    4P + P = 20
    P = 4 is the number of pigs, and
    C = 2

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