Advertisements
Advertisements
प्रश्न
- In how many ways can 8 identical beads be strung on a necklace?
- In how many ways can 8 boys form a ring?
Advertisements
उत्तर
- Number of ways 8 identical beads can be stringed by `((8 - 1)!)/2 = (7!)/2`
-
Number of ways 8 boys form a ring = (8 – 1)! = 7!
APPEARS IN
संबंधित प्रश्न
Find the number of 4-digit numbers that can be formed using the digits 1, 2, 3, 4, 5 if no digit is repeated. How many of these will be even?
In how many ways can the letters of the word PERMUTATIONS be arranged if the vowels are all together.
Write the total number of possible outcomes in a throw of 3 dice in which at least one of the dice shows an even number.
The number of different ways in which 8 persons can stand in a row so that between two particular persons A and B there are always two persons, is
In a room there are 12 bulbs of the same wattage, each having a separate switch. The number of ways to light the room with different amounts of illumination is
If `""^10"P"_("r" - 1)` = 2 × 6Pr, find r
Choose the correct alternative:
The product of r consecutive positive integers is divisible b
How many words can be formed with the letters of the word MANAGEMENT by rearranging them?
If m+nP2 = 90 and m–nP2 = 30, then (m, n) is given by ______.
The number of permutations by taking all letters and keeping the vowels of the word ‘COMBINE’ in the odd places is ______.
