Permutation and CombinationHard
Question
How many signals can be given by means of 10 different flags when at a time 4 flags are used, one above the other?
Options
A.10P4
B.10C4
C.4
D.40
More Permutation and Combination Questions
The number of 5 digit even numbers formed with the digits 2,3,5,7,9 is (Rept. not allowed)...How many 6 digit different number can formed with help of the digits of numbers 121 and 202?...Ten different letters of an alphabet are given. Words with five letters are formed from these given letters. Then, the n...How many 4 digit numbers can be formed with digits 1, 2, 3, 4, 5 when digits may be repeated ?...Eleven members of a committee sit round a circular table. In how many ways can they sit so that the secretary and joint ...