Question

$In space straight a space legislative space assembly space election comma space straight a space political space group space hired space straight a space public space relations space straight f space straight m. space to space promote space its space candidate space in space three space ways space colon space telephone comma space house space calls comma space and space letters. space The space cost space per space contact space left parenthesis in space paise right parenthesis space is space given space in space matrix space straight A space as cost space per space contact straight A equals space open square brackets table row 40 row 100 row 50 end table close square brackets space telephone comma space houseecall comma space letter The space number space of space contacts space of space each space type space made space in space two space cities space straight X space and space straight Y space is space given space by comma straight B equals space open square brackets table row 1000 500 5000 row 3000 1000 10000 end table close square brackets Find space the space total space amount space spent space by space the space group space in space the space two space cities space straight X space and space straight Y.$

Solution

straight A equals space open square brackets table row 40 row 100 row 50 end table close square brackets space comma straight B equals space open square brackets table row 1000 500 5000 row 3000 1000 10000 end table close square brackets therefore space BA equals space open square brackets table row 1000 500 5000 row 3000 1000 10000 end table close square brackets space space open square brackets table row 40 row 100 row 50 end table close square brackets equals open square brackets table row cell 40000 plus 50000 plus 250000 end cell row cell 120000 plus 10000 plus 50000 end cell end table close square brackets space equals space open square brackets table row 340000 row 720000 end table close square brackets therefore space amount space spent space by space the space group space in space city space straight X space equals space paise space 340000 space equals space Rs. space 3400 space space and space amount space spent space by space the space group space in space city space straight Y space equals space paise space 720000 space equals space Rs. space 7200

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