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D05 Math
Question 51
2021 April(D05) Math Question 51
Word Problems
- Cost
Percentage Increase / Decrease
Choice D
S
a
l
e
p
r
i
c
e
u
s
i
n
g
t
h
e
c
o
u
p
o
n
=
25
+
15
=
40
Sale\; price\; using\; the\; coupon =25+15=40
S
a
l
e
p
r
i
ce
u
s
in
g
t
h
e
co
u
p
o
n
=
25
+
15
=
40
R
e
g
u
l
a
r
p
r
i
c
e
×
(
1
−
20
%
)
=
S
a
l
e
p
r
i
c
e
u
s
i
n
g
t
h
e
c
o
u
p
o
n
Regular\; price \times(1-20\%)= Sale\; price\; using\; the\; coupon
R
e
gu
l
a
r
p
r
i
ce
×
(
1
−
20%
)
=
S
a
l
e
p
r
i
ce
u
s
in
g
t
h
e
co
u
p
o
n
=
>
R
e
g
u
l
a
r
p
r
i
c
e
×
(
1
−
20
%
)
=
40
=>Regular\; price \times(1-20\%)= 40
=>
R
e
gu
l
a
r
p
r
i
ce
×
(
1
−
20%
)
=
40
=
>
∴
R
e
g
u
l
a
r
p
r
i
c
e
=
{
4
0
}
{
(
1
−
20
%
)
}
=
50
=> \therefore Regular\; price = \frac\{40\}\{(1-20\%)\} =50
=>
∴
R
e
gu
l
a
r
p
r
i
ce
=
4
{
0
}
{(
1
−
20%
)}
=
50
Skills you are tested for:
Percentage Increase / Decrease
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