The table shows the number of games required to finish the last 50 world series. what was the average length of a world series?
a) 5.16 games
b) 5.26 games
c) 5.36 games
d) 5.46 games
games to end 50 world series
number of games frequency
4 14
5 13
6 9
7 14

We are given with the number of games and their frequency. To get the average length of a World Series, we need to take the weighted average of the data.
Multiply the number of games by the frequency. Add the all the values and divided by the total frequency
So,
[4 (14) + 5 (13) + 6 (9) + 7 (14)] / (14 + 13 + 9 + 14) = 5.46