Question

The ratio of 5 Rupee notes to 10 Rupee notes in a purse is 3: 4. there are 77 notes in the purse. how much money is there in the purse

Answer 1

ratio=3:4
3x+4x=77
7x=77
x=11
there were 11*3=33 5 rupee notes and 11*4=44 10 rupee notes 
so total money=33*5+44*10= 605 rs

Answer 2

So Total notes =77 Then 5 rupees note 10 rupees note Ratio 3 : 4 3+4=7 3+4=7 Notes of 5 rupees-3 : notes of 10 rupees-4 3/7*77=33 4/7*77=44 Now- 33*5=165 44*10=440 At last= 165 +440 =605 Answer