You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[EX Q]: There were 2 friends playing a video game online when 2 more players joined the game . If each player had 6 lives , how many lives did they have total ?
[EX A]: 24

[EX Q]: John needs $ 2.5 . He has $ 0.75 . How much more money does he need ?
[EX A]: 1.75

[EX Q]: On a recent trip to CA , we averaged 50 miles per hour . On the return trip we averaged 60 miles per hour . Determine the average speed of the trip to CA and back .
[EX A]:
54.545