Permutation and CombinationHard
Question
A father with 7 children takes 4 of them at a time to the zoo, as often as he can without taking the same four children together more than once. How often will he go? How often will each child go ?
Options
A.30, 10
B.35, 15
C.30, 20
D.35, 20
More Permutation and Combination Questions
Boxes numbered 1, 2, 3, 4 and 5 are kept in a row and they are necessarily to be filled with either a red or a blue ball...How many different words can be formed from the letters of ′CONSTANTINOPLE′ in which all three N come togeth...The number of word groups by taking at least 4 letters of each words ′LENGTH′, ′STROKE′ and R...The number of ways of arranging the letters AAAAA, BBB, CCC, D, EE & F in a row if the letter C are separated from one a...Let Pn denotes the number of ways in which three people can be selected out of ′n′ people sitting in a row, ...