MBA
Exam
Five sockets are aligned in a row. There are black and white plugs to be placed in the sockets. Only one plug fits into a socket, and plugs of the same color are indistinguishable. two black plugs cannt be placed in adjacent sockets. in how many color combos can the plugs be placed in the sockets. 1) 15 2) 8 3) 11 4) 13 5) 12
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