Solution: How many such arrangements are possible for four balls taken 2 balls at a time?

(Last Updated On: January 10, 2018)

How many such arrangements are possible?

Problem Statement: EE Board October 1997

There are four balls of four different colors. Two balls are taken at a time and arranged in a definite order. For example, if a white and red balls are taken, one definite arrangement is white first, red second, and another arrangement is red first, white second. How many such arrangements are possible?

Problem Answer:

There are 12 ways to make such arrangements

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Solution: How many such arrangements are possible for four balls taken 2 balls at a time?
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