a student bought some pens at rs8 each and some pencils at rs1.50 each. if the total number of pens and pencils purchased is 16 and their total cost is rs.50. how many pens did he buy?
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Let the no of pens be x
no of pencils be y.
given,
x+y=16
therfore,y=16-x
8x+1.5y=50
8x+1.5 (16-x)=50
8x+24-1.5x=50
6.5x=50-24
x=260/65
x=13/3
x=4.34=no. of pens
no of pencils be y.
given,
x+y=16
therfore,y=16-x
8x+1.5y=50
8x+1.5 (16-x)=50
8x+24-1.5x=50
6.5x=50-24
x=260/65
x=13/3
x=4.34=no. of pens
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