As a nurse in a maternity ward, you are tracking the weights of newborn babies. In the month of August, 360 babies are born, with a mean weight of 8.1 pounds. In the month of September, 291 babies are born, with a mean weight of 7.8 pounds.

Find the combined mean by weighting each monthly mean by the number of babies: (360 × 8.1 + 291 × 7.8) ÷ (360 + 291) = 5,185.8 ÷ 651 ≈ 7.966 pounds. Rounded to the nearest hundredth, the combined mean is 7.97 pounds, choice D.

AI-written and checked against the verified answer.