Question

what percentage of people choose baseball or soccer as their favorite sport there is a circle 25% play basketball 35% play football 20% play baseball 15% play soccer and 5% play other

Answer 1

35% chose baseball or soccer

Explanation:

baseball or soccer = 20% + 15% = 35%

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The categories add to 100%, so are mutually exclusive, as you expect when they are "favorite sport" categories. Hence the union of two of them will be their sum. (Otherwise, you'd have to subtract the amount by which the categories overlap.)