Que: A woman has 14 identical pens to distribute among a group of 10 distinct students. How many ways are there to distribute the 14 pens such that each student gets at least one pencil?

a. ¹⁵C₁₀
b. ¹⁰C₅ * 11
c. ¹⁵C₈ * 4!
d. ¹³C₉
Answer: ¹³C₉

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