If 5Pr = 60 find the value of r. – InterviewSolution

1.

If 5Pr = 60 find the value of r.

Answer»

Given ⁵P_r = 60

⁵P_r = 5 × 4 × 3 = 60

∴ r = 3

5Pr = 60
=>×5!/(5-r)!=60
=>×5×4×3×2/(5-r)!=60

=>(5-r)!=2×1=2!

=>5-r=2

=>r=5-2=3

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