engineering recuitment TANGEDCO Field Assistant (Trainee) Mock Test Quantitative Aptitude Ratio and Proportion

যদি a : b = 5 : 2 হয় এবং b : c = 8 : 9 হয়, তাহলে a : b : c এর মান কত?  

1
20 : 8 : 9
2
20 : 8 : 7
3
10 : 8 : 9
4
20 : 8 : 19
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