Answer:
20
Explanation:
We are told in the question that
John scored a mean of 19 points in his first 3 basketball games
His total points for his first 3 games = Number of games × Mean of those games
= 3 × 19
His total points for his first 3 games = 57 points
We aslo told that in his fourth game, he scores 23 points.
His average score for all four basketball games is calculated as:
(57 points + 23 points) ÷ 4 games
= 80 points ÷ 4 games
= 20
His Average for the four games = 20