Class 11MathematicsPermutation and CombinationDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
EasyIn how many ways can one send $6$ new-year greeting cards to $4$ people?
- A$360$
- B$180$
- C$4096$
- D$24$
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While dialing a telephone number,an old man forgets the last two digits,remembering only that these are different. If he dials the last two digits at random,what is the probability that the number is dialed correctly?
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View SolutionThe total number of $4$-digit numbers which can be formed using the digits $1, 2, 3, 4$ without repetition such that the digit $n+1$ never immediately follows the digit $n$ is:
How many words can be formed using the letters of the word $COURTESY$ such that the first letter is $C$ and the last letter is $Y$?
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View SolutionHow many $6$-digit numbers can be formed using the digits of the number $112233$?
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View SolutionOut of $10$ persons,$A, B$,and $C$ are to speak at a function. If $A$ wants to speak before $B$ and $B$ wants to speak before $C$,in how many ways can they speak?
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