alleryA 40 kg mixture has A, B, C, D in the ratio 5 : 9 : 4 : 2. The amount of B is
- 16 kg
- 18 kg
- 20 kg
- 9 kg
Show answer and solution
Correct answer: B. 18 kg
The 20 parts weigh 40 kg, so a part is 2 kg and B is 9 x 2 = 18 kg.
RRB NTPC Ratio and Proportion — practice questions — page 3
Explore 62 free Ratio and Proportion questions in RRB NTPC Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 61–62 of 62.
Worked practice questions
If the ratio of boys to the whole class is 3 : 8, the ratio of boys to girls is
- 3 : 5
- 3 : 8
- 5 : 3
- 8 : 3
Show answer and solution
Correct answer: A. 3 : 5
Girls are 8 - 3 = 5 parts, so boys to girls is 3 : 5.
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