Time taken by A and B together to complete the work = (32 × 48)/ (32 + 48) = 19.2 days Time taken by C alone to complete the work = 1.25 × 19.2 = 24 days
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?
5 persons P, Q, R, S, and T are sitting around a round table. How many times can they sit in different ways so that Q and T do not sit together?
In how many different ways can the letters of the word “DISCHARGE” be arranged in such a way that the vowels always come together?
In how many ways will a team of 5 people be selected among 12 people such that one specific person will always be selected, and one specific person will...
In a group of 9 boys and 6 girls, 5 students have to be selected. In how many ways it can be done so that only 2 boys are included.
Find the number of words that can be formed by using all letters of the word ' PAINTING', if it starts with letter A and end with letter T.
In how many different ways can the letters of the word ‘VARIOUS’ be arranged in such a way that the vowels occupy only the odd positions?
...In how ways can the selection be made so that a particular member is always included?
Four dice are rolled simultaneously. What is the number of possible outcomes in which at least one of the die shows 2?
From 6 officers and 8 Jawans, in how many ways can 5 be chosen to include exactly 3 officers?
