PathFinder007 wrote:

The following table gives some data collected about the population of a town by age:

What is the ratio of the number of people whose age is 18 or greater but less than 25 to the number of people whose age is 25 or greater but less than 40?

A. 6:7

B. 23:17

C. 17:23

D. 18:19

E. Cannot be determined

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The attachment **Karishma_Quant12.png** is no longer available

IMO : A

consider the following fig:

Attachment:

1.jpg [ 10.57 KiB | Viewed 4169 times ]
Let "a" be no. of ppl whose age is <18, "b" be between 18-25(including 18), "c" be between 25-40(including 25), "d" be >40(including 40)\(\frac{b}{c}\) =?From the question stem

a=420 --(i)

b+c+d=690--(ii)

c+d=510--(iii)

a+b+c=810--(iv)

Sub (iii) in (ii) --> b = 180

sub a=420 and b=180 in (iv) we get c =210

therefore

b:c = 180:210

=6:7

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