Class 11MathematicsPermutation and CombinationDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
EasyFour speakers will address a meeting where speaker $Q$ will always speak before $P$. Then,the number of ways in which the order of speakers can be prepared is
- A$256$
- B$128$
- C$24$
- D$12$
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