Question

madhu has a total of Rs 640 as currency notes in the denominators Rs 50,Rs 20 , and Rs 10 . the ratio of the number of Rs 50 notes and Rs 20 notes is 3:5 . if she has a total of 30 notes of, how many notes of each denomination has she ?

Answer 1

Answer:

50 notes= 6

20 notes= 10

10 notes= 14

no of 50 notes = 3x

no of 20 notes = 5x

no of 10 notes = 30-(3x+5x)=30-8x

(50*3x) + (20*5x)+ 10(30-8x) = 640

150x + 100x + 300 -80x = 640

250x -80 x = 640-300

170x = 340

x = 340/170

x =2

50 notes = 3x = 3*2 =6

20 notes = 5x = 5*2 =10

10 notes = 30-8x = 30-8*2 = 30-16 = 14