2021Quantitative AptitudeGS Paper II
The sum of deviations of a set of observations, x1, x2, ...., xn measured from 50 is -10 and the sum of deviations from 46 is 70, then the number of observations is
Select an option to check your answer
A, B and C can do a work in 20, 30 and 60 days respectively. In how many days can A complete the work, if he is assisted by B and C on every third day?
The median of the following distribution is 28.5, the values of x and y are respectively
| Class Interval | Frequency |
| 0-10 | 5 |
| 10-20 | x |
| 20-30 | 20 |
| 30-40 | 15 |
| 40-50 | y |
| 50-60 | 5 |
Seven poles P, Q, R, S, T, U and V are put in such a way that the distance between the next two decreases by 1 metre. The distance between the first two poles P and Q is 10 metres. What is the distance between first pole P and the last pole V?
A plane left 30 minutes later than the scheduled time and in order to reach its destination 1500 km away in time it has to increase its speed by 250 km/h from its usual speed. The usual speed is