Question

7. Determine if the following are in proportion.

(a) 15, 45, 40, 120

(b) 33, 121, 9, 96


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Answer 1

Use the rule product of means = product of extremes

15 ×120= 45×40

1800=1800 so they are ij proportion

b) 33× 96= 121×9

3168= 1089

so they are not in proportion