Question

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13. A sum of 800 is in the form of denominations of 10 and 20. If the total number of
notes is 50, find the number of notes of each type.​

Answer 1

Answer:

10rs note : 20

20rs note : 30

Step-by-step explanation:

x+y=50             =====>    10x+10y=500

10x+20y=800   =====>    10x+20y=800

                                         -10y=-300       ====>  y=30 and x=20