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kingbucky
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There are six boxes numbered 1, 2, 3, 4, 5, 6. Each box is to be 22 May 2025, 22:29
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

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Question Stats:

0% (00:00) correct 100% (02:15) wrong based on 1 sessions

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There are six boxes numbered 1, 2, 3, 4, 5, 6. Each box is to be filled up either with a white ball or a black ball in such a manner that at least one box contains a black ball and all the boxes containing black balls are consecutively numbered. The total number of ways in which this can be done equals.

(A) 15
(B) 21
(C) 63
(D) 64

Source: CAT PYQ 1990
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B