Question

The sum of ₹ 500
as in the form of
denominations of ₹ 5 and ₹ 10.If the
total number of notes is 90 find the
number of notes of each denomination
(Hint; let the number of 5 rupee notes
be'x', then number of 10 rupee notes=90-x)
pls help me ​fast

Answer 1

Step-by-step explanation:

ATQ

₹5notes + ₹10 notes= 90 notes

also ₹5 notes × ₹10 notes = ₹500

₹5 notes = x

₹10 notes = 90-x

x(90-x) = 500

90x - x^2 = 500

x^2 - 90x + 500 = 0

Answer 2

Let the no.of 5 rupees notes=x

then the value of x 5 rupee notes is 5x rupees

And the no.of 10 rupees notes=90-x

then the value of 90-x 10 rupee notes=(90-x)(10)

=900-10x

Given

5x+900-10x=500

5x-10x =500-900

-5x=(-400 )

x=-400/-5

x=80

Therefore, the value of x is 80

5x=5×80=400.

900-10x=900-10×80

=900-800

=100