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प्रश्न
Are the following numbers in proportion 12, 15, 18 and 20?
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उत्तर
12, 15, 18 and 20 are in proportion
if 12 : 15 = 18 : 20
if 12 x 20 = 15 x 18 .........`{"a"/"b"="c"/"d"⇒"ad"="bc"}`
if 240 = 270
which is not true.
12, 15, 18 and 20 are not in proportion.
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