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 |
|
|||||
|
||||||
|
||||||
| = 48.55 |
Discussion:
33 comments Page 3 of 4.
Priyanka said:
1 decade ago
How total boys 24 remaining 8 boys means? Boys inside 16 or separate 8 boys? Please explain.
Rajwinder singh said:
1 decade ago
Difference between 50.25 & 45.15 is 5.1.
16*5.1 = 81.6.
81.6/24 = 3.40.
45.15+3.40 = 48.55.
16*5.1 = 81.6.
81.6/24 = 3.40.
45.15+3.40 = 48.55.
(1)
Vino venkat said:
1 decade ago
Any short cut method to this problem?
Gokul Sreekumar said:
1 decade ago
A more simple way.
Instead of doing these complex multiplications you can simply take (50.25+50.25+45.15) /3 & you will get the answer.
Instead of doing these complex multiplications you can simply take (50.25+50.25+45.15) /3 & you will get the answer.
Muneer.s said:
1 decade ago
16 boys total weight= 50.25*16= 804kg
8 boys total weight= 45.15*8= 361.2
Total weight of all boys= 804+361.2 =1165.2
Avg weight of all boys= 1165.2/24= 48.55
8 boys total weight= 45.15*8= 361.2
Total weight of all boys= 804+361.2 =1165.2
Avg weight of all boys= 1165.2/24= 48.55
Swapnil said:
1 decade ago
16 * 50.25= 804 (total wt of 16 boys)
8 * 45.15= 361.2 (total wt remaining 8 boys)
_____________________
24 = 1165.2 (total wt of all boys)
= 1165.2/24
=48.55 (Average wt of all boys)
8 * 45.15= 361.2 (total wt remaining 8 boys)
_____________________
24 = 1165.2 (total wt of all boys)
= 1165.2/24
=48.55 (Average wt of all boys)
Madhavi said:
1 decade ago
@heema
It can also be solved sing the following formula:n1x1+n2x2/n1+n2....... n1=16,n2=8,x1=50.25 & x2=45.15
It can also be solved sing the following formula:n1x1+n2x2/n1+n2....... n1=16,n2=8,x1=50.25 & x2=45.15
M.V.KRISHNA/PALVONCHA said:
1 decade ago
Avg. of 16 boys= 50.25,
weight of 16 boys=(50.25*16)=804,
avg. of 8 boys= 45.15,
weight of 8 boys=(45.15*8)=361.2,
total no. boys=24,
total weight of the boys=1165.2.
avg. weight of 24 boys=(1165.2/24)
=48.55.
weight of 16 boys=(50.25*16)=804,
avg. of 8 boys= 45.15,
weight of 8 boys=(45.15*8)=361.2,
total no. boys=24,
total weight of the boys=1165.2.
avg. weight of 24 boys=(1165.2/24)
=48.55.
PavaN said:
1 decade ago
I you understand the concept then u can do like this also.. its easy too
16:8 = 2:1
then, (50.25x2 + 45.15x1) / (2+1) = 48.55
16:8 = 2:1
then, (50.25x2 + 45.15x1) / (2+1) = 48.55
(4)
Karan said:
1 decade ago
@Jitu superb explanation.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers