Q. The value of $\ ^{15}C_{8} +^{15}C_{9} -^{15}C_{6} -^{15}C_{7}\$is
A) $- 1$
B) $0$
C) 1
D) None of these
Explanation
(b)
$\ ^{15}C_{8} + \ ^{15}C_{9} - \ ^{15}C_{6} - \ ^{15}C_{7}$
$= \ ^{15}C_{8} + \ ^{15}C_{9} - \ ^{15}C_{9} - \ ^{15}C_{8}$
$= 0$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.