MEDIUM
11th ICSE
IMPORTANT
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How many numbers between 99 and 1000 (both excluding) can be formed, such that every digit is either 3 or 7 ?

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Important Questions on Permutations and Combinations

MEDIUM
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 16
How many numbers between 99 and 1000 (both excluding) can be formed such that there is no restriction?
MEDIUM
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 16
How many numbers between 99 and 1000 (both excluding) can be formed such that no digit is repeated?
MEDIUM
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 16
How many numbers between 99 and 1000 (both excluding) can be formed such that the digit in hundred's place is 7 ?
MEDIUM
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 16
How many numbers between 99 and 1000 (both excluding) can be formed such that the digit in ten's place is 7?
MEDIUM
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 16
How many numbers between 99 and 1000 (both excluding) can be formed, such that the digit 7 does not appear at any place?
MEDIUM
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 16
How many numbers between 99 and 1000 (both excluding) can be formed, such that the digit in unit's place is 7 ?
HARD
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 16
How many numbers between 99 and 1000 (both excluding) can be formed, such that at least one of the digits is 7?
EASY
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 17
In how many ways can 4 different balls be distributed in 3 boxes?