If a:b = 5:7 and c:d = 2a:3b, then ac : bd is – McqOptions

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1.	If a:b = 5:7 and c:d = 2a:3b, then ac : bd is
A.	20:38
B.	50:147
C.	10:21
D.	50:151
Answer» C. 10:21

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