CA Foundation doubt
15C3r = 15 C r+3, then r is equal to (a) 2 (b) 3 (c) 4 (d) 5
Asked by Rubee20 Jul 2024360 views
4 answers
Jyoti · 20 Jul 2024
Option b answer 3
Sahili · 20 Jul 2024
3
Sneha · 20 Jul 2024
nCx=nCy 1) x=y 2) x+y=n 3r=r+3 = r=3/2 Or 3r+r+3=15 4r=12 r=3
Piyush · 20 Jul 2024
If value of n is same then -> 15 = 3r + r + 3 On solving you'll get r=3
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