Homework Help: math

Posted by sam on Tuesday, February 16, 2010 at 2:57pm.

Of the 12 full-time mathematics faculty at a high school, five drink coffee and eight do not enjoy teaching 8 a.m. classes. How many faculty both drink coffee AND enjoy teaching at 8 a.m.

math - Reiny, Tuesday, February 16, 2010 at 6:09pm
Use Venn digagrams
Intersect two circles, label one C the other T
let the intersection be x
then the part of C outside the intersection is 5-x
the part of T outside the intersection is 8-x

5-x + x + 8-x = 12
x = 1
math - jahquae, Monday, March 8, 2010 at 9:59pm
i dont kno

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