Nandu went to a a shopkeeper to buy pen, notebook, eraser and paint box. the shopkeeper told him the prices pen cost four and a half rupees and eraser one and a half a notebook six and a half and a paint box 25 rupees and 50 paise what one of its article prepare his bill if Nandu gave a hundred rupees note how much money does she get back
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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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