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If 2/5 of a number a equals 1/3 of a number b, then a : b is

A3 : 5
B2 : 3
C5 : 6
D6 : 5
Answer & Solution
Correct answer: C. 5 : 6
2a/5 = b/3 gives a/b = (1/3)(5/2) = 5/6.
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