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20 February, 10:29

During a donation drive, $9210 was collected by 80 students. Each girl donated $120 and each boy donated $105. How many girls are there? (Use supposition)

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  1. 20 February, 10:55
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    Total→$120*80=$9600__suppose all 80 is girls

    extra→$9600-$9210=$390

    difference→$120-$105=$15

    opposite→$390:$15=26boys

    girls→80-26=54
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