Question
Find the average of first 19 whole
numbers.Solution
First 19 whole numbers = 0, 1, 2, …….., 17, 18 Average = (1st term + last term)/2 = (0 + 18)/2 = 9
Five different pens out of which 2 are red and the rest are blue are to be arranged in a line. Find the number of ways in which the two red pens are not...
Find the number of ways to arrange each letter of the word 'COMMITTEE' such that all the vowels always come together.
How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "RECLAIM"?
From 6 officers and 8 Jawans, in how many ways can 5 be chosen to include exactly 3 officers?
7 children are to be selected from a group of 8 boys and 6 girls. In how many ways will the children with at most 3 girls and at least 4 boys be selected?
How many 4-digit numbers can be formed using digits 1–9 if repetition is not allowed and the number is even?
A club has 6 men and 5 women. How many committees of 5 have at least 2 women?
In how many ways can 5 boys and 3 girls be arranged in a row so that no two girls sit together?
How many four-letter words without repetition having exactly two vowels can be formed by using the letters of the word "SEMINAR"?
In how many different ways can the letters of the word ‘NATURE’ be arranged in such a way that the vowels occupy only the odd positions?
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