A certain office supply store stocks 2 sizes of self-stick notepads, each in 4 colors: blue, green, ...
A certain office supply store stocks 2 sizes of self-stick notepads, each in 4 colors: blue, green, yellow, or pink. The store packs notepads in packages that contain either 3 notepads of teh same size and the same color or 3 notepads of the same size and of 3 different colors. If the order in which the colors are packed is not considered, how many different packages of the types described above are possible?
Answer/Solution
16
Steps/Work
1: 3 notepads of the same size and the same color = the first size in 4 ways + second size is also in 4 ways = 8
2: 3 notepads of the same size and of 3 different colors = the first size in 4c3 ways + second size is also in 4c3 ways = 4 = 4 = 8
so total = 16 ways
ANS:C
2: 3 notepads of the same size and of 3 different colors = the first size in 4c3 ways + second size is also in 4c3 ways = 4 = 4 = 8
so total = 16 ways
ANS:C