| Age Group | 20 -30 | 30 - 40 | 40 - 50 | 50 - 60 | 60 - 70 |
| Number of students | 25 | 60 | 40 | 20 | 20 |
| Number of Regular Players | 10 | 30 | 12 | 2 | 1 |
| Number of Students | Number of Regular Players | Percentage of Regular Players |
| 25 | 10 | $\frac{10}{25} \times 100=40$ |
| 60 | 30 | $\frac{30}{60} \times 100=50$ |
| 40 | 12 | $\frac{12}{40} \times 100=30$ |
| 20 | 2 | $\frac{2}{20} \times 100=10$ |
| 20 | 1 | $\frac{1}{20} \times 100=5$ |
| Age Group | X | dx(X - A), A = 45 | $\begin{array}{c}d x^{\prime}\left(\frac{d z}{a}\right), c_1=10\end{array}$ | $dx ^{\prime 2}$ | Y | dy(Y - A), A = 30 | $\begin{array}{c} dy ^{ \prime }\left(\frac{d y}{c_2}\right), c _2=5\end{array}$ | $dy ^{\prime 2}$ | dx'dy' |
| 20 -30 | 25 | -20 | -2 | 4 | 40 | 10 | 2 | 4 | -4 |
| 30-40 | 35 | -10 | -1 | 1 | 50 | 20 | 4 | 16 | -4 |
| 40-50 | 45 | 0 | 0 | 0 | 30 | 0 | 0 | 0 | 0 |
| 50-60 | 55 | 10 | 1 | 1 | 10 | -20 | -4 | 16 | -4 |
| 60 -70 | 65 | 20 | 2 | 4 | 5 | -25 | -5 | 25 | -10 |
| $\Sigma d x^{\prime}=0$ | \begin{array}{c}\Sigma d x^2=10\end{array} | $\Sigma d y^{\prime}=-3$ | \begin{array}{c}\Sigma \Sigma d^{\prime 2}=61\end{array} | \begin{array}{c}\Sigma dx^{\prime} dy y^{\prime}=-22\end{array} |
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| Class Interval | Frequency (f) |
| 13-25 | 6 |
| 25-37 | 11 |
| 37-49 | 23 |
| 49-61 | 7 |
| 61-73 | 3 |
| Total | 50 |
| Price(₹) | Output (Units) | TR(₹) | MR(₹) |
| 7 | -- | 7 | -- |
| 5 | 2 | -- | 3 |
| 4 | -- | 12 | -- |
| -- | 4 | -- | (-)4 |