CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

If 20Cr+1=20Cr1, then r is equal to


A

10

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B

11

No worries! We‘ve got your back. Try BYJU‘S free classes today!
C

19

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

12

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A

10


r+1+r1=20

[nCx=nCyn=x+y or x=y]

2r=20

r=10


flag
Suggest Corrections
thumbs-up
2
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Why Do We Need to Manage Our Resources?
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon