FIND THE RATIO OF THE PRICE OF PENCIL TO THAT OF BALL PEN, IF PENCILS COST RS. 16 PER SCORE AND BALL PENS COST RS.8.40 PER DOZEN.
Don't give links, plz.
We know that 1 score = 20
Hence cost of 20 pencils = Rs 16
That is cost of 1 pencil = Rs (16/20) = Rs 0.80
Cost of 1 dozen ball pen = Rs 8.4
Cost of 1 ball pen = Rs (8.4/12) = Rs 0.70
Ratio of price of pencil to the ball pen = 0.8: 0.7 = 8:7
Hence cost of 20 pencils = Rs 16
That is cost of 1 pencil = Rs (16/20) = Rs 0.80
Cost of 1 dozen ball pen = Rs 8.4
Cost of 1 ball pen = Rs (8.4/12) = Rs 0.70
Ratio of price of pencil to the ball pen = 0.8: 0.7 = 8:7