MEDIUM
11th ICSE
IMPORTANT
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How many numbers between 99 and 1000 (both excluding) can be formed, such that the digit in unit's place is 7 ?

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Important Questions on Permutations and Combinations

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?
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 3 letters be posted in 4 letter boxes?
MEDIUM
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 18
In how many ways can 3 letters be posted in 4 letters boxes so that all the letters are not posted in the same letter box?
EASY
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 18
Vijeta has 6 friends to invite for her son's birthday party. In how many ways can she send invitation cards to them if she has three servants to carry the cards?
MEDIUM
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 19
How many words (with or without meaning) of three English alphabets can be formed? How many of these have all distinct alphabets?
MEDIUM
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 19
Two cards are drawn, one at a time, and without replacement, from a deck of 52 cards. Determine the number of ways in which cards can be drawn. What will be the number of ways if the first card is replaced before the second is drawn?
EASY
11th ICSE
IMPORTANT
Understanding ISC Mathematics Class 11 Volume 1>Chapter 8 - Permutations and Combinations>EXERCISE 8.2>Q 20
Eight children are to be seated on a bench. In how many ways can the children be seated?