Test whether 2:4 and 6:12 are in proportion or not?
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(i) product of extremes = 2×8=16
Product of means = 4×6=24
16≠24
2,4,6,8 are not in prodortion.
(ii) Porduct of means = 18×10=180
Porduct of exterms = product of means
Product of exterms = 12×15=180
12,18, 10, 15 are in proportions.
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