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.
Likha kamin said:
8 years ago
I can't understand, according to question sum of all person's is 65 kg and one person is just replaced then in such case we should substract from total weight.
Anyone please clear my confusion.
Anyone please clear my confusion.
Lakshmi said:
8 years ago
The average age of the mother and her six children is 12 years which is reduced by 5 years if the age of the mother is excluded. How old is the mother?
Please explain it with the answer.
Please explain it with the answer.
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?
Bhavya sharma said:
5 years ago
Not able to understand.
Here you poised 20kg to this person's weight but not well 20kg should be added to all persons in one person's weight only 2.5kg should be added.
Am I right.
Here you poised 20kg to this person's weight but not well 20kg should be added to all persons in one person's weight only 2.5kg should be added.
Am I right.
(4)
Aparna said:
1 decade ago
Oral method:.
When the replaced persons weight was 65 kg then no effect takes place.
But due to him all of thems weight has been increased by 2.5kg.
So,
8*2.5=20.
65+20=85.
When the replaced persons weight was 65 kg then no effect takes place.
But due to him all of thems weight has been increased by 2.5kg.
So,
8*2.5=20.
65+20=85.
Rahul said:
1 decade ago
It is not given in question that average weight of each was 65 kg instead it was the weight of only that person who was replaced so they have assumed and done wrongly.
Chitti said:
5 years ago
By using formula,
a = r+nx ------>
a = Added value.
r = Removed value.
n = Number of persons.
x = Change in avg.
So,
a = 65+8(2.5).
a = 85 is new person weight.
a = r+nx ------>
a = Added value.
r = Removed value.
n = Number of persons.
x = Change in avg.
So,
a = 65+8(2.5).
a = 85 is new person weight.
(23)
Vinoth M said:
1 decade ago
When a new person weight is added to 8 peoples weight each person weight is increased by 2.5%
Then weight increased is 8*2.5=20
So the new person age is 65+20=85
Then weight increased is 8*2.5=20
So the new person age is 65+20=85
Rahul said:
1 decade ago
Avg = x.
Sum of 8 person's weight/8 = x.
Sum of 8 person's weight= 8x.
Sum of 8 person's weight = 8x+20.
8x+20-8x-20=0.
8x+20-8x = 20.
Therefore 20+65=85.
Sum of 8 person's weight/8 = x.
Sum of 8 person's weight= 8x.
Sum of 8 person's weight = 8x+20.
8x+20-8x-20=0.
8x+20-8x = 20.
Therefore 20+65=85.
Ankit saxena said:
1 decade ago
Remember the formula for this type of
new person weight=weight of person tht left+total men*average increased after entry of new men...
Hope it wil help u all
new person weight=weight of person tht left+total men*average increased after entry of new men...
Hope it wil help u all
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