NIACL Model Paper 8 with solutions for free online practice

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Question : 50 of 100

Marks: +1, -0

The difference between 20% of a number and

7/15

th of the same number is 124. What is 40% of that number ?

186
200
196
465
None of these

Solution:

(1) Let the number be x.
∴

x × 7/15-{x × 20} /100=124

⇒

{7x}/15-x/5=124

⇒

{7x-3x}/15=124

⇒

{4x}/15=124

⇒

x={124×15}/465

∴40% of 465

={465 × 40 }/100=186

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