A box of frozen vegetables contains 15 packets of equal weight. What is the weight of each packet?

The correct option is C 11 kg
Total weight of the box = 165 kg
Number of frozen packets = 15

So,
Weight of each packet
$=$ Total weight ÷ Number of packets
$=$ 145 ÷ 5

Solving by long division method, we get:

$$\begin{array}{c}11\\ 15165\\ -\underset{–}{15}2\\ 15\\ -\underset{–}{15}\\ 0\end{array}$$

Hence, the weight of each packet is
11 kg.