math
posted by gary .
Mrs. Cindy needs to order new balls for the school students to use at recess. She asks the students what balls she should order. Onethird of the students want Mrs. Cindy to order soccer balls. Onethird of the students want Mrs. Cindy to order basketballs. Onesixth of the students want Mrs. Cindy to order footballs. Fifteen students want Mrs. Cindy to order kickballs. How many students did Mrs. Cindy ask about ordering new balls for recess?

1/3 + 1/3 + 1/6 = 5/6
1  5/6 = 1/6
1/6x = 15
x = 15/(1/6)
x = 15 * 6
x = 90
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