Question

The value of $15C_{3} +^{15} ⥂ C_{13}$ is.

• A. $16C_{3}$
• B. $30C_{16}$
• C. $15C_{10}$
• D. $15C_{15}$

Answer 1

Answer: (A)

$16C_{3}$

Answer 2

$15C_{3} +^{15} ⥂ C_{13} =^{15} ⥂ C_{3} +^{15} ⥂ C_{2} =^{16} ⥂ C_{3}$.