Atul went to a stationery shop to buy 30 pens and equal number of notebooks. If a pen costs ₹
50 and a notebook costs ₹ 40, find the total amount he paid to the shopkeeper. Write an
arithmetic expression for the situation given and solve it using correct order of operations.
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Answer:
notebook pens pencil
A buys 12 5 6
B buys 10 6 7
C buys 11 13 8
⎣
⎢
⎢
⎡
12
10
11
5
6
13
6
7
8
⎦
⎥
⎥
⎤
⎣
⎢
⎢
⎡
0.40
1.25
0.35
⎦
⎥
⎥
⎤
12
=
⎣
⎢
⎢
⎡
4.8+6.25+2.1
4+7.5+2.45
4.4+16.25+2.8
⎦
⎥
⎥
⎤
12
=
⎣
⎢
⎢
⎡
13.15
13.95
23.45
⎦
⎥
⎥
⎤
12=
⎣
⎢
⎢
⎡
157.8
167.4
281.4
⎦
⎥
⎥
⎤
∴ Total coast,
⎣
⎢
⎢
⎡
A
B
C
⎦
⎥
⎥
⎤
=Rs
⎣
⎢
⎢
⎡
157.8
167.4
281.7
⎦
⎥
⎥
⎤
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