Class 11MathematicsPermutation and CombinationDefinition of permutation, Number of permutations with or without repetition, Conditional permutations
EasyHow many $5$-digit numbers can be formed using the digits $3, 4, 7$ once each and the digit $5$ twice?
- A$30$
- B$60$
- C$45$
- D$90$
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Similar Questions
In how many ways can $5$ red,$4$ blue,and $1$ green ball be arranged in a row?
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View SolutionHow many numbers greater than $24000$ can be formed using the digits $1, 2, 3, 4, 5$ without repetition?
Medium
View SolutionBy using the non-zero digits,the number of $5$ digit numbers that can be formed such that each number has the largest digit in its middle place and the digits in the number are distinct is:
Find $r,$ if $5 \times ^{4}P_{r} = 6 \times ^{5}P_{r-1}.$
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View SolutionWhat is the rank of the word "$MOTHER$" when all possible words are formed using all its letters and arranged as in a dictionary?
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