SOLUTION: A desk holder contains 8 pens and 5 pencils. In how many ways can 4 pens or 4 pencils be selected?

Question 810820: A desk holder contains 8 pens and 5 pencils. In how many ways can 4 pens or 4 pencils be selected?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
8*7*6*5 + 5*4*3*2 = 1680 + 120 = 1800
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