Question

1. In which of the following sets, are the numbers in proportion?(1) 5, 10, 15, 20 (2) 5. 20. 20. 100(3) 5. 10. 10. 20 (4) 10, 20, 30, 40​

Answer 1

(1) and (4) are in proportion

because in these two sets they have same distance between them

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