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21 Jan 2019, 03:33
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C
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Difficulty:
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Question Stats:
98% (00:38) correct
2%
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based on 48
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For all numbers a and b, if the operation $ is defined by a$b = ab/2, then 3$(5$8) =
A 10
B 20
C 30
D 40
E 60
A 10
B 20
C 30
D 40
E 60
21 Jan 2019, 04:13
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Bunuel
For all numbers a and b, if the operation $ is defined by a$b = ab/2, then 3$(5$8) =
A 10
B 20
C 30
D 40
E 60
A 10
B 20
C 30
D 40
E 60
Function: a$b = ab/2.
Given,
3$(5$8)
5$8 = 5*8/2 = 20.
3$20 = 3*20 / 2 = 30.
C is the correct answer.
21 Jan 2019, 09:49
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Bunuel
For all numbers a and b, if the operation $ is defined by a$b = ab/2, then 3$(5$8) =
A 10
B 20
C 30
D 40
E 60
A 10
B 20
C 30
D 40
E 60
solve with given function relation
we get
a$b = 30
IMO C
