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    Question

    A farmer has some chickens and some cows. Find out the

    total number of chickens if the total number of heads is 50 and the total number of feet is 160.
    A 22 Correct Answer Incorrect Answer
    B 15 Correct Answer Incorrect Answer
    C 20 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer

    Solution

    Let the total number of cows = x Total number of chickens = y According to the question, x + y = 50 ........... (i) 4x + 2y = 160 ........... (ii) Multiplying equation (i) by 4 and subtracting (ii) by (i) , we get 2y = 40 y = 20 Hence, the total number of chickens = 20

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