A) \[\frac{^{7}{{P}_{5}}}{{{7}^{5}}}\]
B) \[\frac{{{7}^{5}}}{^{7}{{P}_{5}}}\]
C) \[\frac{6}{^{6}{{P}_{5}}}\]
D) \[\frac{^{5}{{P}_{5}}}{{{5}^{5}}}\]
Correct Answer: A
Solution :
Since, each person can leave the cabin at any floor. Total number of ways, \[{{7}^{5}}\] \[\therefore \] Required probability \[=\frac{^{7}{{P}_{5}}}{{{7}^{5}}}\]
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