Ans: C
The required probability
The required probability
$\begin{array}{cl}
= & 1 – 0.7^4 \\
= & 0.7599
\end{array}$
Resources for HKDSE Mathematics
Resources for HKDSE Mathematics
$\begin{array}{cl}
= & 1 – 0.7^4 \\
= & 0.7599
\end{array}$
