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Number of ways in which 21 identical whi...

Number of ways in which 21 identical white balls and 19 identical black balls be arranged in a row so that no 2 black balls may be together is

A

`""^(21)C_(18)`

B

`""^(22)C_(19)`

C

`""^(20)C_(17)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
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