Question Detail
Question
Find the coefficient of x²y⁵ in (x+y)⁷
Correct Answer
Option A is the correct answer.
Detailed Explanation
The term with x²y⁵ in (x+y)⁷ is C(7,5) x²y⁵ = 21 x²y⁵, so coefficient is 21.
Hint
The notes indicate answer A.