Question

Determine whether the following are in proportion a) 2,3,4,5 b) 4,6,8,12
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Answer 1

b) 4,6,8,12

is only proportion

because product of mean = product of extreme

Answer 2

a) 2,3,4,5 is not a proportion (no)

b) 4,6,8,12 is proportion (yes)