Teaching WB Primary TET Mock Test 2023 Quantitative Aptitude Ratio and Proportion Simple Ratios

a : b = 4 : 3, b : c = 2 : 7 ও c : d = 3 : 4 হলে a : b : c : d-এর মান কত?

1
8 : 6 : 21 : 28
2
8 : 9 : 31 : 28
3
8 : 6 : 23 : 29
4
9 : 6 : 21 : 38
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