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Find the quantity of methods of picking 4 cards from a set of 52 playing cards if four cards are of the same unit?
History books are never together.
In how many ways can 17 members be seated in two lines with seating capacity of 9 and 8 members respectively?
1. 9! ×8!
2. �...
How many no. of 4 digits can be formed with the digits 4, 8, 7 & 3 no digit being repeated.
...There are 14 candidates for 5 post. In how many different ways can be post be filled?
How many four digit numbers greater than 5000 can be formed with the digits 4 ,5, 7, 8, and 9?
In a Group of 8 boys and 6 girls, Six children are to be selected. In how many different ways can they be selected such that at least one boy should be ...
In how ways can the selection be made so that a particular member is always excluded?
A man has 15 friends out of which 7 are his relatives. In how many ways can he invite his 9 friends in which at least 5 must be his relatives?
In how many ways can the letters of the word TERRORISTS be arranged by taking 4 letters at a time?
