Ratio, proportion and averages
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- In the exam pattern: Computer Based Test (CBT), Arithmetic: 35 questions, 35 marks (RRB notice, 15 Apr 2024).
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Take a full mock →Q1 · Ratio, proportion and averages · MEDIUM
The ratio of the present ages of two brothers is 4:5. After 5 years, the ratio of their ages will be 5:6. What is the present age of the younger brother?
Q2 · Ratio, proportion and averages · MEDIUM
In what ratio must rice costing Rs 42 per kg be mixed with rice costing Rs 54 per kg so that the mixture is worth Rs 46 per kg?
Q3 · Ratio, proportion and averages · MEDIUM
A and B started a business with investments of Rs 12,000 and Rs 18,000 respectively. After 6 months, C joined them with an investment of Rs 24,000. If the total profit at the end of the year is Rs 10,500, what is C's share of the profit?
Q4 · Ratio, proportion and averages · MEDIUM
The average of 11 results is 50. The average of the first six results is 49 and the average of the last six results is 52. What is the sixth result?
Q5 · Ratio, proportion and averages · MEDIUM
Two numbers are in the ratio 3 : 5. If 9 is subtracted from each number, the ratio becomes 12 : 23. What is the smaller number?