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IMPORTANT
Earn 100

The number of times the digit 3 will be written when listing the integers from 1 to 1000 is

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Important Questions on Permutation and Combination

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JEE Main
IMPORTANT
Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 12
The number of 5 digit numbers which are divisible by 4 with digits from the set {1,2,3,4,5} and the repetition of digits is allowed, is.........
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JEE Main
IMPORTANT
Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 13
Number of ways of selecting pair of black squares in chessboard such that they have exactly one common corner is equal to
HARD
JEE Main
IMPORTANT
Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 14
If the different permutations of the word EXAMINATION are listed as in a dictionary, then how many words (with or without meaning) are there in this list before the first word starting with M.
HARD
JEE Main
IMPORTANT
Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 15
Number of numbers greater than a million and divisible by 5 which can be formed by using only the digits 1, 2, 1, 2, 0, 5 & 2 is -
HARD
JEE Main
IMPORTANT
Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 16
The total number of ways in which four boys and four girls can be seated around a round table, so that no two girls sit together is equal to
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JEE Main
IMPORTANT
Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 17
5 boys & 3 girls are sitting in a row of 8 seats. Number of ways in which they can be seated so that not all the girls sit side by side, is
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JEE Main
IMPORTANT
Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 18
Ten different letters of alphabet are given. Words with four letters are formed from the these letters, then the number of words which have at least one letter repeated is -
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JEE Main
IMPORTANT
Mathematics Crash Course JEE Main>Chapter 21 - Permutation and Combination>Level 1>Q 19
The number of ways of arranging the letters AAAAA, BBB, CCC, D, EE and F in a row if no two ‘C’s are together :