Permutation and CombinationMedium
Question
In how many ways can a selection of 4 letters be made out of the letters of the word ′MATHEMATICS′ ?
Options
A.136
B.330
C.70
D.None of these
More Permutation and Combination Questions
The sum of all the numbers which can be formed by using the digits 1, 3, 5, 7 all at a time and which have no digit repe...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 ...A building has ground floor and 10 more floors. Nine persons enter in a lift at the ground floor. The lift goes up to th...The total number of factors of 1998 (including 1 and 1998) is-...The total number of rectangles on a chess board is-...