TANCET
Group Studies
Mock Tests
Notes
Library
Join Now
Question Practice
Share
Target (sec):
00:00
Question 1
Share
The sum $^{20}C_8 + ^{20}C_9 + ^{21}C_{10} + ^{22}C_{11} - ^{23}C_{11}$
A.
$^{22}C_{12}$
B.
$^{23}C_{12}$
C.
$^{21}C_{10}$
D.
0
Discussion
Join the Conversation
Log in to post comments and replies.
Log In
Open Discussion
❓ Question: Practice this question with detailed solutions and... | TANCET Group Studies | Tancet Group Studies