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.
Answer: Option
Explanation:
| Required average |
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| = 48.55 |
Discussion:
33 comments Page 4 of 4.
Jithu said:
1 decade ago
See @hema
Avg=total/no
avg_weight=total_weight/no_student
here 16 boys's avg =50.25
let us take x be total
Avg=x/no
ie,50.25=x/16
so
x=50.16*25
x=804------(1)
let take y be total
then
Avg=y/no
ie,45.15=y/8
So y= 45.15*8
y==361.20--------(2)
Total_number of students is=16+8=24
So all weight=x+y
i.e,804+361.20=1165.20
avg=total/no
therefore avg=1165.20/24
Avg=48.55
Avg=total/no
avg_weight=total_weight/no_student
here 16 boys's avg =50.25
let us take x be total
Avg=x/no
ie,50.25=x/16
so
x=50.16*25
x=804------(1)
let take y be total
then
Avg=y/no
ie,45.15=y/8
So y= 45.15*8
y==361.20--------(2)
Total_number of students is=16+8=24
So all weight=x+y
i.e,804+361.20=1165.20
avg=total/no
therefore avg=1165.20/24
Avg=48.55
Shree Hema said:
1 decade ago
I cant understand. Please anyone help me ?
Sms said:
2 decades ago
Very complicated and tough problem. Difficult to solve it and need more explanation.
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