Jambmaths question:
In how many ways can 6 subjects be selected from 10 subjects for an examination?
Option A:
210
Option B:
215
Option C:
216
Option D:
218
Jamb Maths Solution:
$\begin{align} & ^{10}{{C}_{6}}=\frac{10!}{6!(10-6)!}=\frac{10\times 9\times 8\times 7}{6!\times 4!} \\ & ^{10}{{C}_{6}}=\frac{10\times 9\times 8\times 7}{4\times 3\times 2\times 1}=210 \end{align}$
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