thirty tickets were sold for a concert, some at60 cents and the rest at $1. if the total raised was $22, how many had the cheaper tickets?
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If all the tickets were sold for 60c then 0.60x30=$18 would have been raised. The extra $22-$18=$4 was raised from tickets costing $1. Each $1 ticket raises an extra 40c, so 400c/40c = 10 tickets were sold for $1 and 30-10=20 for 60c.
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??? iam not understand
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