4. The average age of 5 basketball players currently on the court is 24 years and 6 months. If the coach's age is included in the calculation of the average, then the average age is 27 years. How old is the coach?
4. The players together have $24.5 \cdot 5 = 122.5$ years.

$1 \text{ POINT}$

If the coach is $x$ years old, then $\frac{122.5 + x}{6} = 27$.

$1 \text{ POINT}$

It follows that $x = 39.5$.

The coach is 39.5 years old.

2 POINTS

TOTAL 4 POINTS