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17 Apr 2017, 00:26
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
72% (01:11) correct
28%
(01:17)
wrong
based on 297
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What is the value of x/3 + y/4?
(1) x/12 + y/12 = 7/12
(2) 4x + 3y = 24
(1) x/12 + y/12 = 7/12
(2) 4x + 3y = 24
17 Apr 2017, 01:33
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Lets consider A) x/12 + y/12 =7/12
In this case there are several values of (x,y) that satisfy the equation such as (1,6),(2,5),(3,4),(4,3),(5,2) and (6,1). If we substitute these value in the main eqn x/3 + y/4 we get different values. therefore this option is ruled out.
Now Consider b)4x+3y=24 . The values that satisfy this eqn are (6,0),(0,8) and (3,4). Once we substitute all the values in the main eqn x/3+y/4 we always get the value as 2.
So B is the answer.
In this case there are several values of (x,y) that satisfy the equation such as (1,6),(2,5),(3,4),(4,3),(5,2) and (6,1). If we substitute these value in the main eqn x/3 + y/4 we get different values. therefore this option is ruled out.
Now Consider b)4x+3y=24 . The values that satisfy this eqn are (6,0),(0,8) and (3,4). Once we substitute all the values in the main eqn x/3+y/4 we always get the value as 2.
So B is the answer.
18 Apr 2017, 04:30
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What is the value of x/3 + y/4?
(1) x/12 + y/12 = 7/12
Multiply the equation in 12
x + y = 7......different numbers that statsfy the equation.
Insufficient
(2) 4x + 3y = 24
Divide the equation by 12
x/3 + y/4 = 2
Sufficient
Answer: B
(1) x/12 + y/12 = 7/12
Multiply the equation in 12
x + y = 7......different numbers that statsfy the equation.
Insufficient
(2) 4x + 3y = 24
Divide the equation by 12
x/3 + y/4 = 2
Sufficient
Answer: B
