Solution: How many such combinations are possible?

There are four balls of different colors. Two balls at a time are taken and arranged any way. How many such combinations are possible?

How many such combinations are possible?

Problem Statement: EE Board October 1997

There are four balls of different colors. Two balls at a time are taken and arranged any way. How many such combinations are possible?

Problem Answer:

There are 6 combinations are possible.

Solution:

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