[JEE Main 2010] urn a has 3 distinct red balls urn b has 9 distinct blue balls
Urn A has $3$ distinct red balls, urn B has $9$ distinct blue balls. Two balls from each are taken and swapped. The number of ways is
(a) $36$
(b) $66$
(c) $108$
(d) $3$
1 Answer
VAVidaara Admin
✓ Vidaara Team
✓ Accepted
· 2d ago
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Correct answer: (c) $108$
$\binom32\cdot\binom92=3\cdot36=108$.
JEE Main 2010 · Permutations and Combinations — verified solution by the Vidaara Team.
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