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
If P(n, n) denotes the number of permutations of n different things taken all at a time then P (n, n) is also identical ...The total number of seven digit numbers the sum of whose digits is even is-...If all the letters of the word ″QUEUE″ are arranged in all possible manner as they are in a dictionary, then...The number of rectangles in the adjoining figure is -...If f(x) = 2x + cot-1 x + ln , then f(x) :...