The average weight of two groups consisting of 70 and 30 members are 70 and 30 respectively. What is the total average weight ?
A. 61
B. 58
C. 49
D. 52
Answer:B
The average weight of two groups consisting of 70 and 30 members are 70 and 30 respectively. What is the total average weight ?
A. 61 B. 58 C. 49 D. 52