Discussion

Explanation:

2d + 20 < 54 ⇒ d < 17

d ≠ 14, 15, 16, 12, 8 and 5

d can take value 13 or 11 or 9 or 7 or 6 or 4 or 3 or 2 or 1.

For d = 13, the composite score = 46

Thus, Bala could have scored 13 marks in DI.

Therefore, the required answer is 13.

Answer: 13

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