Ans: A
The required probability
The required probability
$\begin{array}{cl}
= & (1-0.55)\times 0.3 \\
= & 0.135
\end{array}$
Resources for HKDSE Mathematics
Resources for HKDSE Mathematics
$\begin{array}{cl}
= & (1-0.55)\times 0.3 \\
= & 0.135
\end{array}$
