please can u solve this
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nPr = n!/ ( n-r)! = 720
nCr = 120 = n! /r ! ( n-r)!= 120
1/nCr = r! ( n-r)!/n! = 1/120
nPr × 1/nCr = 720× 1/120= 6= r!
r= 3
nCr = 120 = n! /r ! ( n-r)!= 120
1/nCr = r! ( n-r)!/n! = 1/120
nPr × 1/nCr = 720× 1/120= 6= r!
r= 3
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Answer:
r=3
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