Six boxes are numbered 1 2 34 5 and 6 Each box must contain either a white ball or a

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(#M40020775) EXAM question permutation Keep an EYE

Six boxes are numbered 1,2,34,5 and 6. Each box must contain either a white ball or a black ball. At least one box must contain a black ball and boxes containing black balls must be consecutively numbered. find the total number of ways of placing the balls.

A.

15

B.

20

C.

21

D.

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Maths Quotes

A mathematician is a blind man in a dark room looking for a black cat which isn't there

Charles R. Darwin

As for everything else, so for a mathematical theory: beauty can be perceived but not explained.

Arthur Cayley

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Latest exam Aptitude Question SOLUTION: Six boxes are numbered 1,2,34,5 and 6. Each box must contain either a white ball or a black ball. At least one box must contain a black ball and boxes containing black balls must b