The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is:

A، B اور C کا اوسط وزن 45 کلوگرام ہے۔ اگر A اور B کا اوسط وزن 40 کلوگرام ہے اور B اور C کا وزن 43 کلوگرام ہے تو B کا وزن ہے

Answer: 31 kg

Average wait of A, B, and C = 45 kg.

(A+B+C)/3 = 45 kg

A+B+C = 45 *3

so A+B+C = 135 kg …………….( 1)

Average weight of A and B= 40 Kg

A+B= 40 x 2 = 80 kg …………………. (2)

The average weight of B and C= 43

B+C= 43 x 2 = 86 kg ……………………(3)

Let us add 2 & 3 = 80 + 86 kg = 166 kg

But from 1 we know that A+B+C = 135 kg

So, 135+B= 166 kg.

Thus, B = 166 – 135 = 31 kg.

ND11-4-2023

This question appeared in Past Papers (4 times)

Ministry of Information and Broadcasting MOIB Past Papers, Syllabus (1 times)

Police Past Papers (1 times)

Punjab Police Constable Past Papers and Syllabus (1 times)

Punjab Police Past Papers (1 times)

This question appeared in Subjects (4 times)

MATHS MCQS (4 times)

Related MCQs