Multiple choice

The weights in kilogram of 9 members in a school boxing team are 54, 59, x, 53, 73,49, 50, 58, 45 If the average is 56 then x is

  1. 61 Kg

  2. 62 Kg

  3. 64 Kg

  4. 63 Kg
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D Correct answer
Explanation

Sum of 9 members = 56 * 9 = 504. Sum of known = 54+59+53+73+49+50+58+45 = 441. x = 504 - 441 = 63.

AI explanation

Using the arithmetic mean formula, the total sum of the weights of all 9 members is 9 multiplied by 56, giving 504 kg. The sum of the given 8 weights is 54 + 59 + 53 + 73 + 49 + 50 + 58 + 45 = 441 kg. Subtracting this sum from the total weight gives the value of x as 504 - 441 = 63 kg.

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