Permutations and Combinations questions
785 published questions with worked solutions.
- The number of permutations of all the letters of the word 'EXERCISES' is
- The number of natural numbers smaller than 10^4, in the decimal notation of which all the digit are different is
- The number of numbers of 9 distinct digits such that all the digits in the first four places are less than the digit in the...
- The total number of all proper factors of 75600 is
- How many numbers greater than 24000 can be formed by using the digits 1,2,3,4,5 when no digit is repeated, is
- The number of ways of selecting 10 balls from unlimited number of red, black, white and green balls is
- The number of ways in which 21 objects can be grouped into three groups of 8,7 and 6 objects is
- Total number of four digit odd numbers that can be formed by using 0,1,2,3,5,7 is
- The total number of arrangements which can be made out of the letters of the word 'Algebra', without altering the relative...
- In how many ways 5 different beads can be arranged to form a necklace?
- The number of ways in which thirty five apples can be distributed among 3 boys so that each can have any number of apples, is
- The number of ways in which one can post 5 letters in 7 letters boxes is
- The number of all the possible selections which a student can make for answering one or more questions out of eight given...
- The total number of ways in which six '+' and four '-' signs can be arranged in a line such that no two '-' signs occur together...
- The sum of all that can be formed with the digits 2,3,4,5 taken all at a time is
- A committee of 5 is to be formed from 9 ladies and 8 men. If the committee commands a lady majority, then the number of ways this...
- The total number of ways in which 12 persons can be divided into three group of 4 persons each is
- The number of ways in which 20 different pearls of two colours can be set alternately on a necklace, there being 10 pearls of...
- The total number of arrangements of the letters in the expression a^3b^2c^4 when written at full length, is
- The total number of seven-digit numbers the sum of whose digits is even is
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