From the brucellosis blood-volume data, which group contributed the largest total volume?

• A. 16 tubes of 10 cc
• B. 28 tubes of 7 cc
• C. 31 tubes of 9.5 cc
• D. 15 tubes of 8.5 cc

Answer: (C)

Total volume from each group is found by multiplying the number of tubes by the volume per tube. Calculations: 16 × 10 = 160 cc; 28 × 7 = 196 cc; 31 × 9.5 = 294.5 cc; 15 × 8.5 = 127.5 cc. The largest total is 294.5 cc, coming from 31 tubes of 9.5 cc.