Jambmaths question:
Find the number of ways of selecting 8 subjects from 12 subjects for an examination
Option A:
490
Option B:
495
Option C:
496
Option D:
498
Jamb Maths Solution:
Number of ways of selecting is
$^{12}{{C}_{8}}=\frac{12!}{8!(12-8)!}=\frac{12!}{8!4!}=\frac{12\times 11\times 10\times 9\times 8!}{4\times 3\times 2\times 8!}=495$
Year of Exam: