SOLUTION: Need help knowing where to start to figure if there were 500 people @ a concert on Friday night and 675 on Saturday night, how many people came to the concert both nights? I think

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Question 868720: Need help knowing where to start to figure if there were 500 people @ a concert on Friday night and 675 on Saturday night, how many people came to the concert both nights? I think you just subtract the two from each other. Am i right?The answer is 175
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
675-500both nights, Yes. Good work 'backwards' :)
Difficult to know there were only 675 available to attend either night.