What will be the number of permutations of n different things, taken r at a time, where repeatition is allowed?
How many different words can be formed with the letters of the word PRACTICE such that each of the word begin with E and ends with R?
In how many ways Barcelona’s football team captain and vice-captain be elected from a team of 15 men?
In how many different ways can the letter of the word ‘STRONG’ be arranged?
- How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "MONARCH"?
From 7 experienced and 4 fresher candidates, a panel of 8 is to be made. How many ways can the panel be formed if it includes at least 6 experienced can...
In How many ways can a student choose a program of 5 courses, if 9 courses are available and 2 courses are compulsory for every student?
A letter is randomly selected from the word "DETACHMENT." What is the probability that the selected letter is a vowel?
How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "MISTAKE"?
How many numbers of five digits may be formed with the digits 5, 0, 9, 0, and 6?
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