Aptitude - Average - Discussion

Discussion Forum : Average - General Questions (Q.No. 12)
12.
The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.
47.55 kg
48 kg
48.55 kg
49.25 kg
Answer: Option
Explanation:
Required average
= 50.25 x 16 + 45.15 x 8
16 + 8
= 804 + 361.20
24
= 1165.20
24
= 48.55
Discussion:
31 comments Page 3 of 4.

Sms said:   1 decade ago
Very complicated and tough problem. Difficult to solve it and need more explanation.

Sree ranga said:   6 years ago
50.25 * 16 + 45.15 = x * 24,
804+361.2 = x * 24,
1165.2/24 = x,
X = 48.55.
(1)

Vijay said:   7 years ago
Hi, I am not getting the answer. Can anyone explain me to get it?

Bramara said:   9 years ago
Formula for this type of problem is (w1*x1) + (w2*x2) / (w1+w2).

Shelly said:   9 years ago
Guys the ratio is divided in 2:1. Now use allegation method.

Shree Hema said:   1 decade ago
I cant understand. Please anyone help me ?

Vicky said:   9 years ago
Is there any shortcut for this problem?

Vino venkat said:   1 decade ago
Any short cut method to this problem?

Bala Mayak said:   8 years ago
Superb, nice explanation @Pavan.

Sirisha said:   7 years ago
Nice trick, Thanks @Pavan.


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