Question

The average weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by 1 Kg. What was the teacher's weight?
(Please explain in steps)
Thankyou!

Answer 1

Answer: 86 kg

step by step explanation:Here, n = 21, a = 64, b = 65

Weight of teacher = n (b - a) + b

= 21 (65 - 64) + 65 = 21 + 65 = 86 kg

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Answer 2

Answer:

86 kg

Step-by-step explanation:

LET THE TEACHER'S WEIGHT BE x.

given that average weight of 21 boys was 64 kg.

total weight = 1344 kg

(1344 + x) / 22 = 65.

1344 + x = 65 * 22

1344 + x = 1430

x = 1430 - 1344

  = 86 kg

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