Practice Test Discussion

Q)

The average weight of 10 women is increased by 1 kg if 2 women of 42 kg and 38 kg are replaced by 2 men. Find the average weight of both the men?

    • Explanation

    According to the question

    We use the formula,

    Value of new observations= a + nb

    Here, n=10, a= 42+38= 80 kg, b= 1 kg

    Total weight of both men = a+nb

    = 80+10×1

    = 90 kg

    Average wieght of both men= 902=45 kg

    Hence, Option C is correct.

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