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.

During a school play , Jonah staffed the snack bar . He served 0.25 pitcher of lemonade during the first intermission , 0.4166666666666667 pitcher during the second , and 0.25 pitcher during the third . How many pitchers of lemonade did Jonah pour in all ?
0.9166666666666666

While on vacation , Nancy took 49 pictures at the zoo and 8 at the museum . If she later deleted 38 of the pictures , how many pictures from her vacation did she still have ?
19

While playing at the arcade , Edward won 3 tickets playing ' whack a mole ' and 5 tickets playing ' skee ball ' . If he was trying to buy candy that cost 4 tickets a piece , how many could he buy ?

2