SSC MTS Model Paper 1

Question : 43 of 150

Marks: +1, -0

Out of 4 numbers, whose average is 60, the first one is one-fourth of the sum of the last three. The first number is:

Solution:

(3) Let the first number be x, then

x = { 60 × 4 - x }/ { 4 }

⇒4 x = 240 - x

⇒

5 x = 240

⇒ x = { 240 } /{ 5 } = 48

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