What is the value of $^{8} c_{4} +^{8} c_{3}$ ?

^{8} c_{5}

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^{9} c_{4}

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Solution

The correct option is D $^{9} c_{4}$
Given from the following passage that $^{n} C_{r} +^{n} C_{r - 1} =^{n + 1} C_{r}$ ,
Considering $n = 8$ and $r = 4$ gives,
$^{8} C_{4} +^{8} C_{3} =^{9} C_{4}$

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