Latest iGate Aptitude Question SOLUTION: The average age of 5 girls is 7. The oldest among them is 15 years old. What is the average age of others?

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The average age of 5 girls is 7. The oldest among them is 15 years old. What is the average age of others?

Asked In iGate charan (10 years ago)

Solved ABHOY KUMAR Read Solution (8)

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Read Solution (8) :

harshal agrawal  (10 years ago)

sum of ages of girls = 35
sum of ages of rest of 4 girls=20
average=20/4=5

Is this solution Helpfull? Yes (18) | No (1)  

ABHOY KUMAR  (10 years ago)

(g1+g2+g3+g4+g5)/5=7
g1+g2+g3+g4+g5=35
one of the girl having age 15
g1+g2+g3+g4=20
avg of rest of the girls
(g1+g2+g3+g4)/4=20/4
=5

Is this solution Helpfull? Yes (6) | No (2)  

Hari Sunkara  (10 years ago)

Let total 5 girls age is x.
Then x/5=7
then x=35.
so in the 5 girls, oldest one among them is 15 years old.

So from total 35 we need to decrease 15 in order to find remaind 4 girls average.
So 35-15=20
So 4 girls average is 20/4=5.
So the average age of others is 5

Is this solution Helpfull? Yes (6) | No   

KALIA MUDULI  (10 years ago)

so simple....

ans: 5

Is this solution Helpfull? Yes | No   

tirupathi reddy  (10 years ago)

Let the other four girls ages be x, x, x, x
(15+x+x+x+x)/7= 35
X = 5

Is this solution Helpfull? Yes | No   

Gowthami Maddu  (9 years ago)

average of 5 students including the elder one is 7. i.e
(15+4x)/5 = 7
By solving this we will get the average age as 5 yrs

Is this solution Helpfull? Yes | No   

savithri a m  (9 years ago)

5
5*7-4*x=15
x=5

Is this solution Helpfull? Yes | No   

b.teja  (8 years ago)

average 0f 5 girls=7
oldest girl age is 15
5*7=35 oldest=15
total age of 4 girls 35-15=20
20/4=5

Is this solution Helpfull? Yes | No   

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