Question

Shruti has received total of rupees 780 as currency note in the denomination of 10, 20 & 50. the ratio of number of 50 notes and 10 rupees note is 3:2 . if she received total 32 notes.


Q1) the ratio of number of 50 rupees notes to 20 rupees note ???

a)7:5
b)8:11
c)8:3
d)3:11​

Answer 1

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$Given \: Devshi \: has  \: 590  \: Rupees$

RS. 50, 20 & 10 are there ⇒ Total 25 notes

RS. 50, 20 & 10 are there ⇒ Total 25 notes

Rs. 50 & Rs. 20 ⇒3:5

$Notes of Rs.50=3x$

$Notes \: of Rs.20=5x$

$Notes \: of Rs.10=25−(3x+5x)=25−8x.$

$Amount in 50 Rupee notes ⇒50×3x=150x$

$Amount in 20 Rupee notes  \\ ⇒20×5x=100x.$

$Amount in 10 Rupee notes  \\ ⇒10(25−8x)=250−80x$

$Total \: Amount =590$

$⇒150x+100x+250−80x=590$

$⇒250−80x=590−250$

$⇒170x=340$

$∴x=2$

$So \: Deveshi \: has$

$Notes of Rs.50=3(2)=6i.e;150(2)=300Rs.$

$Notes of Rs.20=5(2)=10i.e;100(2)=200Rs.$

$Notes of Rs.10=25−8(2)=9i.e;=90Rs$