A. 40 kgs
Feedback Total weight of boys in the class = 25 *48 = 1200 kgs
Total weight of all students in the class = 45 * 40 = 1800 kgs
Total weight of the girls in the class = 1800 - 1200 = 600 kgs
Average weight of girls = 600/15 = 40 kgs
Correct answer choice (3)