RRB RPF RPSF SI and CONS Model Papers 10 with solutions

Question : 60 of 120

Marks: +1, -0

If a : b = c : d = e : f = 1 : 2, then ( 3a + 5c +7e): (3b + 5d + 7 f ) is equal to

Solution:

(4)

a/b=c/d=e/f=1/2

∴{3 a}/{3 b}= {5 c}/{5 d}= {7 e}/{7 f}= {1}/{2}

∴{3 a+5 c+7 e}/{3 b+5 d+7 f}= {1}/{2}

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