The number of different ways that they can stand in line is 6 ways.
Given that,
Based on the above information, the number of different ways should be
Here we use the permutation formula to determine the no of different ways
[tex]= ^3P_3\\\\= \frac{3!}{3 -3}!\\\\= 3!\\\\= 3\times 2\times 1[/tex]
= 6
Therefore we can say that the number of different ways that they can stand in line is 6 ways.
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