Jharkhand PSC Prelim Exam 2006 Solved Paper

Question : 80 of 100

Marks: +1, -0

If a number of its 50% and 25% average is 210. So the number is-

Solution:

Let, no.is =

x

then it 50% =

x × {50/100} = x/2

its 25% =

x/4

Average no of 3 no. =

x/1 + x/2 + x/4 = {7x}/12

According to question

{7x}/12 = 210

⇒

7x = 210 × 12

x = 360

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