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There are two urns. UrnA has. 3 distinct...

There are two urns. UrnA has. 3 distinct red balls and urn B has 9 distinct blue balls. From each urn two balls are taken out at random and then transferred to the other . The number of way in which this can be done is :

A

66

B

108

C

3

D

36

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The correct Answer is:
B
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