Question

a sum of 800rs is in the form of dominations of 10rs and 20rs. if the total number of notes is 50 ,find number of each type​

Answer 1

Answer:

10rs × 20 number of note = 200rs

20rs × 30 number of note = 600rs

600 +200 =800 rs and 30+20= 50 number of note

Step-by-step explanation:

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Answer 2

Answer:

there are 30(20 rs notes) and 20(10 rs.notes)

Step-by-step explanation:

let the number of 10rs.notes be x and 20rs.notes be y.

10*x+20*y=800

10(x+2y)=800

x+2y=800/10

x+2y=80(first equation)

x+y=50(second equation)

hence,

x+2y=80

-x-y=-50

y=80-50

y=30

x=50-30=20

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