In a bombing attack, there is 50 % chance that a bomb will hit the target. At least two independent hits are…

let probability of hitting the target $=\mathrm{p}\Rightarrow \mathrm{p}=\frac{1}{2}$

Let $n$ be the minimum number of bombs

According to given condition
$1-\left({}^{n}C_0{P}^0(1-P{)}^n+{}^{n}C_1{P}^1(1-P{)}^{n-1}\right)\ge \frac{99}{100}$

$\Rightarrow 2^n\ge (n+1)100$

$\begin{array}{lll}n=10& \Rightarrow & 2^{10}\ge 1100\text{ Reject }\\ n=11& \Rightarrow & 2^{11}\ge 1200\text{ Select }\end{array}$