In $(2x + 3y)^{5}$, coefficient of $x^{3}y^{2}$ is:
A$810$
B$720$
C$360$
D$1080$
Answer & Solution
Correct answer: B. $720$
$\binom{5}{2}(2)^{3}(3)^{2} = 10 \cdot 8 \cdot 9 = 720$.
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