math
posted by olivia .
in a high school there are 27 hockey players and 15 soccer players. if 8 persons played both sports, how many different people played in these sports.

Draw a Venn diagram
It overlaps 8 (Intersection of hockey and soccer sets)
27  8 =19 play only hockey
15  8 = 7 play only soccer
8 play both
so there are 19+7+8 players total 
thanks a lot, so is the answer those numbers added up?

find the 12th term of the harmonic secquence 1/2, 1/6,1/10...

3
8 × 5
4
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