Ans: (a) $50\text{ kg}$ (b) No
- The weight of John
$\begin{array}{cl}= & 60 \div (1+20\%) \\
= & 50\text{ kg}
\end{array}$ - The weight of Susan
$\begin{array}{cl}= & 60 \times (1-20\%) \\
= & 48 \text{ kg} \\
\neq & 50\text{ kg}
\end{array}$
Therefore, they are not of the same weight.
