Sticky pads

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Sticky pads

by rd85 » Thu Jul 16, 2009 2:19 am
2 sizes of sticky pads. Each has 4 colors – Blue, Green, Yellow, and Purple. The pads are packed in packages that contain either 3 notepads of same size and same color or 3 notepads of same size and of 3 different colors. How many different packages of the types described are possible?
a. 6
b. 8
c. 16
d. 24
e. 32

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by shibal » Thu Jul 16, 2009 4:13 am
same size and color:
2*4(two sizes and 4 colors) = 8
same size and different colors
size A: 1*4C3 = 4
size b: 1*4C3 = 4

8+4+4=16

hope it helps

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by rd85 » Thu Jul 16, 2009 5:02 am
Thanks a lot