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3 May, 01:46

How many ways can Pete, Mary, Sue, and Joe stand in a line if Joe and Sue cannot stand next to each other?

A.

4

B.

6

C.

12

D.

16

E.

18

+2
Answers (1)
  1. 3 May, 04:00
    0
    There are 12 (C) because

    Pete, Joe, Mary, Sue

    Pete, Sue, Mary, Joe

    Mary, Sue, Pete, Joe

    Mary, Joe, Pete, Sue

    Sue, Mary, Joe, Pete

    Sue, Mary, Pete, Joe

    Sue, Pete, Joe, Mary

    Sue, Pete, Mary, Joe

    Joe, Mary, Sue, Pete

    Joe, Mary, Pete, Sue

    Joe, Pete, Sue, Mary

    Joe, Pete, Mary, Sue
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