a sum of 500 rs denominations of 5rs and 10 rs. if the total number of notes is 90 find the number of notes of each denomination.

Question

a sum of 500 rs denominations of 5rs and 10 rs. if the total number of notes is 90 find the number of notes of each denomination.

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Charlie 2 weeks 2021-11-19T18:00:33+00:00 2 Answers 0 views 0

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    0
    2021-11-19T18:02:28+00:00

    Let the total no of 5 Rs notes be x and 10 Rs notes be y

    x+y = 90......(1)

    5x+10y = 500.....(2)

    Multiplying eq (1) by 10

    10x+10y = 900......(3)

    Subtracting eq (2) from eq (3)

    After calculation,

    5x = 400

    x = 80

    Substituting x = 80 in eq (1)

    x+y = 90

    80+y = 90

    y = 10

    Therefore, No of 5 Rs notes is 80 and no of 10 Rs notes is 10

    0
    2021-11-19T18:02:30+00:00

    Answer:

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    Step-by-step explanation:

    Total sum = 500

    Let number of 5 rupees note be x and that of 10 be y

    Total notes = 90

    value of 5 and 10 rupee note be 5x and 10y

    According to the question

    X+y=90

    y=90x.....1

    And 5x+10y=500

    x+2y=100.......2

    Put 1 in 2

    x+1802x=100

    x=80

    x=80

    Therefore if put in 1 y = 10

    So we have 400 ruppes of 5 rupee note and 100 of 10 rupess note

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