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Prathyusha Pendyala

· started a discussion

· 1 Months ago

short cut (Question: 232966.0 )

consider avg of boys and girls,then do allegation

12 11
\ /
45/4
/ \
3/4 1/4
so ratio is 3:1
now 600*3/4=450 boys

600*1/4=150

Question:
In a school with 600 students, the average age of boys is 12 years and that of the girls is 11 years. If the average age of the school is 11 years and 9 months, then the number of the girls in the school is
Options:
A) 450
B) 250
C) 150
D) 350
Solution:

Ans: (c)

ADITYA

· commented

· 1 Months ago

nice

devi

· commented

· 1 Months ago

Thanks

Vivek Sager

· commented

· 1 Months ago

nice.. however its 47/4

Bhashkar Raj

· commented

· 1 Months ago

How is it possible 45/4.
It is 47/4.ok
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