A. 5/11

**B. 6/11 (Correct)**

C. 7/11

D. 8/11

Explanation:

Part filled by (A + B + C) in 3 minutes = 3(1/30 + 1/20 + 1/10) = 11/20

Part filled by C in 3 minutes = 3/10

Required ratio = 3/10 * 20/11 = 6/11

Answering Exams

A. 5/11

**B. 6/11 (Correct)**

C. 7/11

D. 8/11

Explanation:

Part filled by (A + B + C) in 3 minutes = 3(1/30 + 1/20 + 1/10) = 11/20

Part filled by C in 3 minutes = 3/10

Required ratio = 3/10 * 20/11 = 6/11

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