Related InterviewSolutions

• Of the three numbers, the first is twice the second and the second is twice the third. The average of the reciprocal of the numbers is \(\frac{7}{72}\) . What are the three numbers ?
• The average temperature of Monday to Wednesday was 37°C and of Tuesday to Thursday was 34°C. If the temperature on Thursday was \(\frac{4}{5}\) that of Monday, what was the temperature on Thursday ?
• The average monthly salary of the workers in a workshop is 8500. If the average monthly salary of 7 technicians is Rs 10,000 and the average monthly salary of the rest is Rs 7800, the total number of workers in the workshop is (a) 18 (b) 20 (c) 22 (d) 24
• The average annual income (in Rs) of certain agricultural workers is S and that of other workers is T. The number of agricultural workers is 11 times that of other workers. Then, the average annual income (in Rs) of all the workers is(a) \(\frac{S+11T}{12}\)(b) \(\frac{S+T}{2}\)(c) \(\frac{11S+T}{12}\)(d) \(\frac{1}{11S}+T\)
• 3 years ago, the average age of a family of 5 members was 17 years. A baby having been born, the average age of the family is same today. The present age of the baby is (a) 3 years (b) 2 years (c) 1\(\frac12\)years (d) 1 year
• The average of marks of 28 students in Mathematics was 50. Eight students left the school and then this average increased by 5. What is the average of marks obtained by the students who left the school ? (a) 37.5 (b) 42.5 (c) 45 (d) 50.5
• In an examination, a pupil’s average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination ?(a) 8 (b) 9 (c) 10 (d) 11
• A company produces on an average 4000 items per month for the first three months. How many items it must produce on an average per month over the next 9 months to average 4375 items per month over the whole year ? (a) 4500 (b) 4600 (c) 4680 (d) 4710
• The average price of 10 books is Rs 12, while the average price of 8 of these books is Rs 11.75. Of the remaining two books, if the price of one is 60% more than the price of the other, what is the price of each of these two books ? (a) Rs 8; Rs 12 (b) Rs 10; Rs 16 (c) Rs 5; Rs 7.50 (d) Rs 12; Rs 14
• The average of the squares of the first ten natural numbers is(a) 40 (b) 50 (c) 47.5 (d) 38.5