Problem Solving (PS) | Re: In six successive games, a baseball team scored 3 runs once, 6 runs tw

In six successive games, a baseball team scored 3 runs once, 6 runs twice, and 9 runs three times. What was the average (arithmetic mean) number of runs the team scored per game over the six-game period?

A. 8
B. 7
C. 6
D. 5
E. 4