Question

Example 11: Deveshi has a total of Rs 590 as currency notes in the denominations of
Rs50,R$20 and Rs10. The ratio of the number of Rs50 notes and Rs 20 notes is 3:5. If she has
a total of 25 notes, how many notes of each denomination she has?​

Answer 1

Answer: Rs 50 notes is 6

Rs 20 notes is 10

Rs 10 notes is  9

Step-by-step explanation:

Given,

       total money of Deveshi = Rs 590

     

 let the Rs50 and Rs 20 notes be 3x and 5x

so Rs 10 notes be 25 - 3x+5x

                   = 25-8x

   ATQ

 (3x)50 +(5x)20 + (25-8x)10 = 590

 150x + 100x +250 -80x = 590

170x = 590-250

x=340/170

x=2

therefore notes of 50 is 3x = 3*2=6

     notes of 20 is 5x = 5*2 = 10

     notes of 10 is 25 - 8x

                        = 25 -8*2

                         =25-16

                           =9