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Questions  >>  CBSE XII  >>  Math  >>  Matrices
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Three shopkeepers X,Y and Z go to a store to buy stationery items. X purchases 12 dozen marker pens, 5 dozen ink pen and 6 dozen pencils. Y purchases 10 dozen marker pens, 6 dozen ink pen and 7 dozen pencils. Z purchases 11 dozen marker pens, 13 dozen ink pens and 8 dozen pencils. A marker pen cost Rs 40/- , a pen costs Rs. 7/- and a pencil Rs. 1 /- each. Using matrix multiplication calculate the individual bills of X, Y and Z.


$(A)\; X = Rs. 5252 , Y =Rs. 7388, Z = Rs.3468$
$(B)\; X = Rs. 6252 , Y =Rs. 5388, Z = Rs.6468$
$(C)\; X = Rs. 6252 , Y =Rs. 5388, Z = Rs.6468$
$(D)\; X = Rs. 7352 , Y =Rs. 5768, Z = Rs.4568$

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