Aptitude - Average - Discussion
Discussion Forum : Average - General Questions (Q.No. 5)
5.
The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?
Answer: Option
Explanation:
Total weight increased = (8 x 2.5) kg = 20 kg.
Weight of new person = (65 + 20) kg = 85 kg.
Video Explanation: https://youtu.be/ceg2jvHsiJU
Discussion:
84 comments Page 4 of 9.
Sarvesg said:
1 decade ago
The first line says average weight weight of person is increased by 2.5.
1) So the total weight increase is = 2.5*8 = 20.
2) Then it says when old person weighting 65 kg is replaced by new one since the weight increase is because of only one person add the old person weight+the average weight = 65+20 = 85.
1) So the total weight increase is = 2.5*8 = 20.
2) Then it says when old person weighting 65 kg is replaced by new one since the weight increase is because of only one person add the old person weight+the average weight = 65+20 = 85.
Fakhar said:
1 decade ago
I am totally confused. Can any one give me solution?
Sneha said:
1 decade ago
@Manoj Kumar Sir, your tricks are really useful.
Manoj Kumar said:
1 decade ago
Thanks for your support guys. Will post more useful information in future.
Saravanan said:
10 years ago
Replaced value+(Increase in average*Total number of observation).
Mahnoor said:
10 years ago
I'm totally confused. Why method change again an again?
Victor said:
10 years ago
Can I have some more tricks?
Honey said:
10 years ago
But one person is excluded from 8 and a new person comes?
Nandini said:
10 years ago
Hai friends.
Can any one explain me why we add 20+65? Why not 20-65?
Can any one explain me why we add 20+65? Why not 20-65?
Naveen said:
9 years ago
The average of marks obtained in 120 students was 35. If the average of passed candidates was 39 and that of failed candidates is 15, the no of candidates who passed the examination is?
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