Im having problems with a question:
A survey of 500 television watchers produced the following information:
285 watch football games
195 watch hockey games
115 watch basketball games
45 watch both football and basketball games
70 watch football and hockey games
50 watch hockey and basketball games
50 do not watch any of the three kinds of games
A) How many people in the survey watch all three kinds of games?
B) How many people watch exactly one of the sports?
USING VENN DIAGRAM ONLY
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You can consider F is 285, His 195 and B is 115. |F Ո H Ո B| = |F U H U B|-|F|-|H|-|B|+| F Ո H |+| H Ո B |+|F Ո B|.
It is calculated as 20. |F – H- B|=|F| - | F Ո H |-| F Ո B |+| F Ո H Ո B |=190.
Add 135 with 190, so the number of viewers who watch one of the games is 325.
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