C-10-Q025: The coefficient of $y^4$ in the expansion of $(1+y)^7$ is —

C-10-Q025: The coefficient of $y^4$ in the expansion of $(1+y)^7$ is — | প্রশ্ন করি

The coefficient of y4y^4y4 in the expansion of (1+y)7(1+y)^7(1+y)7 is —