RRB RPF RPSF SI and CONS Model Papers 2 with solutions

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Question : 25 of 120

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In a school, 10% of number of girls is equal to 20th of number of boys. Ratio between the number of boys to number of girls is

1 : 2
2 : 1
1 : 4
4 : l

Solution:

(b) If boys

= x

and girls

= y

, then

y× { 10 }/ { 100 } = { x } /{ 20 }

⇒ { y }/ { 10 } = { x } /{ 20 }

⇒ { { x } }/ { { y } } = { 20 }/ { 10 } = { 2 }/ { 1 }

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