Answer :
Final answer:
The median of the given data set of weights is (b) 65 kg.
Explanation:
The median is the middle value when the data is ordered from smallest to largest.
- First, order the weights from smallest to largest: 59, 60, 61, 62, 62, 63, 63, 64, 64, 64, 65, 65, 65, 65, 65, 65, 65, 65, 65, 66, 66, 67, 67, 68, 68, 69, 70, 70, 70, 70, 70, 71, 71, 72, 72, 73, 74, 74, 75, 77.
- As there are 40 values, the median will be the average of the 20th and 21st values, which are both 65.
- Therefore, the median of the data is 65 kg (option b).