Question

The average weight of 20 boys is 48 kg. However, the weights of three boys, originally 46 kg, 44 kg, and 38 kg, were incorrectly recorded as 'k' kg, 'k+2' kg, and 'k−4' kg, respectively. When the correct weights are used, the average weight increases by 0.5 kg. Determine the value of 'k'.

Q: Answer-The average weight of 20 boys is 48 kg. However, the weights of three boys, originally 46 kg, 44 kg,...

ATQ, 48 20 k k 2 k 4 46 44 3820 48 0.5 960 k k 2 k 4 12820 48.5 1088 3k 2 970 1090 3k 970 3k 1090 970 3k 120 k 40

A 40

B 45

C 65

D 55

E None of these

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The average weight of 20 boys is 48 kg. However, the weights of three boys, originally 46 kg, 44 kg, and 38 kg, were incorrectly recorded as 'k' kg, 'k+2' kg, and 'k−4' kg, respectively. When the correct weights are used, the average weight increases by 0.5 kg. Determine the value of 'k'.

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