railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Ratio and Proportion Simple Ratios

যদি a ∶ b = 3 ∶ 7 হয়, তাহলে (5 a + 7 b) ∶ (7 a + 5 b) এর অনুপাত হবে:

1

3 ∶ 7

2

7 ∶ 11

3

7 ∶ 9

4

8 ∶ 7

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