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Answer

Before
ducks : goats
7u : 5u

7u x 2 + 5u x 4 = 34u ——- 272
1u ——- 272/34 = 8
7u ——- 7 x 8 = 56

(b)
After
ducks : goats
9 : 10
4.5u : 5u

4.5u ——- 4.5 x 8 = 36 (ducks left)
5u ——- 5 x 8 = 40
40 – 36 = 4

Ans : (a) 56 ducks; (b) 4 more goats.

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