railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Simplification

যদি (x +y) ∶ (y + z) ∶ (z + x) = 3 ∶ 5 ∶ 7 এবং (x + y + z) = 45, তাহলে z-এর মান কত?

1
18
2
30
3
27
4
20
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