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Byju's Answer
Standard X
Mathematics
Polynomial
A PURSE CONTA...
Question
A PURSE CONTAINS SOME 25p COINS AND SOME 50p COINS. THE TOTAL AMOUNT IN THE PURSE IS RS 25. IF THE NUMBER OF 50p COINS IS DOUBLE THE NUMBER OF25p COINS, HOW MANY OF EACH COINS IS THERE IN THE PURSE.
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Solution
Let
the
number
of
25
-
paise
coins
=
x
Then
the
number
of
50
-
paise
coins
=
2
x
Now
,
value
of
25
-
paise
coins
=
Rs
0
.
25
x
Value
of
50
-
paise
coins
=
Rs
0
.
50
×
2
x
=
Rs
x
Now
,
according
to
question
:
0
.
25
x
+
x
=
25
⇒
1
.
25
x
=
25
⇒
x
=
25
1
.
25
⇒
x
=
2500
125
⇒
x
=
20
So
,
the
number
of
25
-
paise
coins
=
x
=
20
number
of
50
-
paise
coins
=
2
x
=
2
×
20
=
40
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