Class 11MathematicsPermutations and CombinationsDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
DifficultIn how many ways can $4$ red, $3$ yellow, and $2$ green discs be arranged in a row if the discs of the same colour are indistinguishable?
- A$1260$
- B$126$
- C$630$
- D$2520$
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