Three stationary owner A, B and C sells pen and pencil. The retro of the number of pen to pencil sold by stationary A was 7:5 and that sold by stationary B was 3:2 respectively. The number of pens and pencil sold by stationary C was 128 and retro of number of pen to pencil sold by stationary C was 5:3 The total number of pens sold by stationary A was 10%more than the pen sold by stationary B. Total number of pen and pencil sold by all the three stationary was 874.
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Step-by-step explanation:
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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