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January 29, 2015

January 29, 2015

Posted by **Anna64** on Tuesday, October 23, 2012 at 7:36pm.

- algebra -
**Reiny**, Tuesday, October 23, 2012 at 8:55pmAssuming that of the 480, everybody had either ice cream or yogurt

number for ice cream --- A

number for yogurt ---- B

N( A or B) = N(A) + N(B) - N(A and B)

480 = 260 + N(B) - 200

N(B) = 420

confirm the answer is corrrect by making a Venn diagram.

- algebra -
**Steve**, Tuesday, October 23, 2012 at 8:56pmn+260-200 = 480

n = 420

420 bought just yogurt

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