If 6Pr = 360 and If 6Cr = 15, find r ?
A.5
B.6
C.4
D.3
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6pr=360, 6Cr=15
6Cr= 6Pr/r!
r!=6Pr/6Cr
r!=360/15
r!=24
r=4 (since 4!=24)
ans =C
6Cr= 6Pr/r!
r!=6Pr/6Cr
r!=360/15
r!=24
r=4 (since 4!=24)
ans =C
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