A veterinarian takes blood samples from cows for brucellosis testing. If 16 vacutainers with 10 cc, 31 vacutainers with 9.5 cc, 28 vacutainers with 7 cc, and 15 vacutainers with 8.5 cc were collected, what is the total volume in cc?

• A. 784 cc
• B. 780 cc
• C. 782 cc
• D. 778 cc

Answer: (D)

Total volume is found by multiplying the number of vacutainers by the volume per vacutainer and then summing all groups.

Compute each group: 16 × 10 cc = 160 cc; 31 × 9.5 cc = 294.5 cc; 28 × 7 cc = 196 cc; 15 × 8.5 cc = 127.5 cc. Add them: 160 + 294.5 = 454.5; 454.5 + 196 = 650.5; 650.5 + 127.5 = 778 cc. Since 1 cc equals 1 mL, the total is 778 mL (cc).