RRB NTPC Prelims Model Paper 2 with solutions

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Question : 6 of 101

Marks: +1, -0

If X : Y = 6 : 11 and Y : Z = 9 : 13, then find X : Y : Z.:

45 : 55 : 65
30 : 55 : 65
54 : 99 : 143
54 : 99 : 110

Solution:

(3) Given,

X/Y=6/11

and

y/z=9/13

LCM of 11 and 9 = 99

∴ 6/11× 9/9= 54/99

and

9/13× 11/11= 99/143

Hence, X : Y : Z = 54 : 99 : 143

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