Question

I stationery shop had three types of pens costing 10 rupees 25 and 50 rupees there were twice as many 25 rupees as there were 10 when the 50 rupees and add it up to the value of 350 rupees if the total value of pens was 1550 rupees, how many pens of each type were there.

Answer 1

50 rupees pens add up to 350
no of 50 rupees pens = 350/50=7

let no of 10 rupees pens be 10x
Then number 25 rupees pen are 25(2x)
10 + 50x= 1200
x=20

no 10 rupees pens=20
no 25 rupees pens= 2x20 =40

Answer 2

Answer:

we have to add =50 to 350

now 350\50=7