Question

A sum of Rs 1000 is in the form of denomination of Rs 10 and Rs 20. If the total number of notes is 65, find the number of notes of each type.​

Answer 1

Answer:

total sum= rs.1000

number of notes= 60

let number of rs.10 notes be x and number of rs.50 notes be y

∴x+y=60

∴x=60-y ...eq.1

and 10x+50y=1000 ....eq.2

substituting eq.1 in eq.2 :

10(60-y) + 50y =1000

600-10y+50y=1000

40y=1000-600

40y=400

y=10

x=60-y

x=50

ans. number of:

10 rupee notes is 50 and 50 rupee notes is 10

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Answer 2

Answer:

heyyy,

total sum= rs.1000

number of notes= 60

let number of rs.10 notes be x and number of rs.50 notes be y

∴x+y=60

∴x=60-y ...eq.1

and 10x+50y=1000 ....eq.2

substituting eq.1 in eq.2 :

10(60-y) + 50y =1000

600-10y+50y=1000

40y=1000-600

40y=400

y=10

x=60-y

x=50

ans. number of:

10 rupee notes is 50 and 50 rupee notes is 10

Step-by-step explanation:

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