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Which of the following is an example of using proportion correctly?.
- A.If 2 apples cost £1, then 4 apples cost £2.
- B.If 3 oranges cost £1, then 6 oranges cost £3.50.
- C.If 5 bananas cost £1, then 10 bananas cost £1.50.
- D.If 1 pear costs £1, then 3 pears cost £2.
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