Permutation and CombinationHard
Question
In how many ways can 21 identical white and 19 identical black balls be put in a row so that no two black balls are together?
Options
A.1470
B.1540
C.735
D.None of these
More Permutation and Combination Questions
The number of different words from the letters of the word ′ALLAHABAD′ in which vowels occupy even positions...In a shooting competition a man can score 0, 2 or 4 points for each shot. Then the number of different ways in which he ...Which of the following statement(s) is/are true :-...How many different permutations can be formed from the letters of the word ′MATHEMATICS′which starts from C-...A man has 7 relatives, of which 4 are ladies and 3 gents, his wife has also 7 relatives, of which 3 ladies and 4 gents. ...