Mathematics
Mathematics
Problem
The following table shows the weekly pocket-money (in rupees) received by some students of a class. The arithmetic mean of the distribution is Rs 54.4.| Weekly pocket-money (Rs) | 30–40 | 40–50 | 50–60 | 60–70 | 70–80 |
|---|---|---|---|---|---|
| Number of students | 6 | 8 | k | 7 | 5 |