The table shows the scores of 40 players in a game…

Step 1. The mean. The products $fx$ are $10, 90, 375, 385, 180, 110$, and $\sum fx = 1150$. So $\bar{x} = \dfrac{1150}{40} = 28.75$.

Step 2. The median. $\dfrac{N}{2} = 20$, so the median class is $20$ to $30$, with $cf = 8$ and $f = 15$. Then $\text{median} = 20 + \dfrac{20 - 8}{15} \times 10 = 28$.

Step 3. The mode. The modal class is $20$ to $30$, with $f_1 = 15$, $f_0 = 6$ and $f_2 = 11$. Then $\text{mode} = 20 + \dfrac{15 - 6}{30 - 6 - 11} \times 10 = 20 + \dfrac{9}{13} \times 10 = 26.92$.

Step 4. The estimate. $3 \times 28 - 2 \times 28.75 = 84 - 57.5 = 26.5$.