Calculate Binomial Probability for inequality

Question

How could the binomial probability be calculated for a case of $P(X \geq 2)$ for a given value of $n$ and $p$ ?

Answer 1

Assuming the usual sort of set up, easiest might be $$P(X≥2)=1-P(X=0)-P(X=1)=1-(1-p)^n-np(1-p)^{n-1}$$