Aptitude - Average - Discussion
Discussion Forum : Average - General Questions (Q.No. 11)
11.
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:
Answer: Option
Explanation:
Let A, B, C represent their respective weights. Then, we have:
A + B + C = (45 x 3) = 135 .... (i)
A + B = (40 x 2) = 80 .... (ii)
B + C = (43 x 2) = 86 ....(iii)
Adding (ii) and (iii), we get: A + 2B + C = 166 .... (iv)
Subtracting (i) from (iv), we get : B = 31.
B's weight = 31 kg.
Discussion:
40 comments Page 4 of 4.
Roshan said:
10 years ago
When average is 45 all three so why multiply by three.
Rsm said:
1 decade ago
Anyone explain the logic behind it. Thanks in advance.
Sara said:
9 years ago
Thanks, @Krishna. Your explanation was useful.
Pradeep said:
1 decade ago
@shree hema.
You said simple method. Thanks.
You said simple method. Thanks.
Anjum said:
9 years ago
Thanks, it is easy to access the answers.
Ayisha said:
9 years ago
Exactly right. Thank you all.
Arpit said:
5 years ago
Nice solution. Thanks all.
(1)
Sandeep said:
5 years ago
Thanks @Shree Hema.
Ganeshgore said:
8 years ago
Thanks @Kaustubh.
(1)
Faisal said:
9 years ago
Thanks @Priyanka.
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