Find the number of 4 - digited numbers t...

Find the number of 4 - digited numbers that can be formed using the digits 2, 4, 5, 7 and 8.

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The correct Answer is:

120

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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-PRACTICE EXERCISE

Find the number of 4 - digited numbers that can be formed using the di...
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IF ""^(10)p r = 5040 then r=
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If ""^(n)P(5)=""^(n)P(6) then n is
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If ""^((n+1))P(5): ""^(n)P(5)=3:2, find n
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If ""^(n)P(4):""^(n)P(3)=2:1 then is
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IF ""^((2n-1))P(n-1) : ""^((2n-1))Pn = 3:5 then n=
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There are 12 balls numbered from 1 to 12. The number of ways in which ...
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There are 50 stations on a railway line. The number of different kinds...
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The number of arrangements that can be formed by taking all the ...
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The letters of the word “FLOWER” are taken four at a time and arranged...
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The number of arrangements that can be formed by taking all the letter...
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The different words beging and ending with a vowel that can ma...
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The number of ways in which the letters of the word 'FRACTION' be arra...
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The number of ways in which the letters of the word 'FRACTION' be arra...
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The number of ways in which the letters of the word 'FRACTION' be arra...
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The number of arrangements that can be made by using all the le...
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How many ways are there to arrange the letters in the word G...
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Find the number of ways of arranging the letters of the word TRIANGLE ...
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The letters of the word 'MADHURI' are arranged in all possible ways. T...
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The number of four digited numbers that can be formed using the digits...
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The number of 5 digited numbers using 0, 1, 2,3, 4 no digit being repe...
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