[JEE Advanced 1986] A box has $2$ white, $3$ black, $4$ red balls. In how many ways can $3$ balls be drawn including at least one black?
A box has $2$ white, $3$ black, $4$ red balls. In how many ways can $3$ balls be drawn including at least one black?
1 Answer
VAVidaara Admin
✓ Vidaara Team
✓ Accepted
· 1mo ago
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Answer: $64$.
$\binom93-\binom63=84-20=64$.
JEE Advanced 1986 · Permutations and Combinations — verified solution by the Vidaara Team.
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