The mean weight for team A with 15 members is 140 lbs., the mean weight for team B with 7 members is 135 lbs., and the mean weight for team C with 20 members is 160 lbs. The overall mean weight for all three teams is _________.
A) 145.00
B) 138.78
C) 148.69
D) 178.43

Question

Quizplus · Accepted Answer

The overall mean weight is calculated by dividing the total weight of all team members by the total number of team members. For team A, the total weight is 15 * 140 = 2100 lbs. For team B, it's 7 * 135 = 945 lbs. For team C, it's 20 * 160 = 3200 lbs. The total weight for all teams is 2100 + 945 + 3200 = 6245 lbs. The total number of members is 15 + 7 + 20 = 42. Therefore, the overall mean weight is 6245 / 42 = 148.69 lbs.

The Mean Weight for Team a with 15 Members Is