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07 Apr 2020, 07:13
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
73% (01:15) correct
27%
(01:20)
wrong
based on 30
sessions
History
Date
Time
Result
Not Attempted Yet
07 Apr 2020, 07:34
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Is the number x between .5 and .9 ?
(1) 800x < 620
or, x< 31/40
or,x<0.775
if, x= 0.6, x between .5 and .9
BUT if, x= 0.4, x NOT between .5 and .9 insufficient
(2) 1200x > 620
or, x>31/60
or, x>0.5166
if, x= 0.6, x between .5 and .9
BUT if, x= 0.95, x NOT between .5 and .9 insufficient
combining 1 and 2,
x<0.775 and x>0.5166
or, 0.5166<x<0.775
so, x between .5 and .9 sufficient
correct answer C
(1) 800x < 620
or, x< 31/40
or,x<0.775
if, x= 0.6, x between .5 and .9
BUT if, x= 0.4, x NOT between .5 and .9 insufficient
(2) 1200x > 620
or, x>31/60
or, x>0.5166
if, x= 0.6, x between .5 and .9
BUT if, x= 0.95, x NOT between .5 and .9 insufficient
combining 1 and 2,
x<0.775 and x>0.5166
or, 0.5166<x<0.775
so, x between .5 and .9 sufficient
correct answer C
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