Answer: a) 30, b) 120
Explanation:
Since we have given that
Let the number of points Scored by Dwayne be 'd'.
Number of points in the last basket ball game = 55 points
According to question, we get that

Let the number of points that Chris's score be 'c'.
Number of points Lebron scored = 45
According to question, number of points scored by Chris is given by

a. How many points did Chris score during the game?
c = 30
b. If these are the only three players who scored, what was the team’s total number of points at the end of the game?

Hence, a) 30, b) 120