Question:
The number of values of r satisfying
³9C₃r-1=³9Cᵣ²-1=³9C₃r is
The number of values of r satisfying
³9C₃r-1=³9Cᵣ²-1=³9C₃r is
Show Hint
For combinations, equal values imply equal or complementary indices.
Updated On: Mar 20, 2026
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Use property ⁿCₐ=ⁿCb⟹ a=b or a+b=n.
Step 2: Solving gives r=3 as the only integer solution.
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