The following distribution shows the daily pocket money of 40 students of a class. If the mean pocket money is Rs. 21.70, find the missing frequencies x and y.
Daily pocket money (in Rs) | 10-14 | 14-18 | 18-22 | 22-26 | 26-30 | 30-34 | 34-38 |
Number of students | 8 | 7 | 4 | x | 6 | y | 3 |