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If a and b are positive numbers, is a < c?
(1) The ratio of a to b is 4:1, and the ratio of b to c is 2:7.
(2) ab > bc
(1) The ratio of a to b is 4:1, and the ratio of b to c is 2:7.
(2) ab > bc
01 Nov 2017, 00:23
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Bunuel
If a and b are positive numbers, is a < c?
(1) The ratio of a to b is 4:1, and the ratio of of to c is 2:7.
(2) ab > bc
(1) The ratio of a to b is 4:1, and the ratio of of to c is 2:7.
(2) ab > bc
IMO D
A:B:C
8:2:7
a>c sufficient
ab>bc
b(a-c) > 0
b is positive so, a-c is positive.
a>c sufficient
01 Nov 2017, 00:25
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TaN1213
Bunuel
If a and b are positive numbers, is a < c?
(1) The ratio of a to b is 4:1, and the ratio of of to c is 2:7.
(2) ab > bc
(1) The ratio of a to b is 4:1, and the ratio of of to c is 2:7.
(2) ab > bc
IMO D
A:B:C
8:2:7
a>c sufficient
ab>bc
b(a-c) > 0
b is positive so, a-c is positive.
a>c sufficient
Yes. (1) reads: The ratio of a to b is 4:1, and the ratio of b to c is 2:7.
