Please explain, I don't want to count each and every possibility. I am looking for some short method, some combinations formula to solve this problem in less time.? Any fast methods?
As such there is no short formula. But it's easy to observe:
Same color packets: 4 possibilities (One for each colour)
Different color packets: Choosing 3 out of four colors - 4C3 = 4
Similarly for Type 2 packets.
Total 2*8=16.[/quote]OPEN DISCUSSION OF THE QUESTION HERE : a-certain-office-supply-store-stocks-2-sizes-of-self-stick-92842.html
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