Question

Rubina went to a bank to withdraw Rs.2000. She asked the cashier to give the cash in

Rs.50 and Rs.100 notes only. She got 25 notes in all. Can you tell how many notes each of

Rs.50 and Rs.100 she received ​

Answer 1

Answer:

Number of Rs. 50 notes = x = 10 notes

Number of Rs. 100 notes = 25-x=25-10=15 notes

Step-by-step explanation:

Let the number of Rs.50 notes be x

Thus, number of Rs. 100 notes = 25-x

Money withdrawn = Rs. 2000

Therefore,

x*50 + (25-x)*100 = 2000

50x+2500-100x=2000

-50x=-500

x=10

Therefore,

Number of Rs. 50 notes = x = 10 notes

Number of Rs. 100 notes = 25-x=25-10=15 notes

I hope this answer helps you, please mark this as brainliest.

Answer 2

$\huge \sf Answer :$

Rs 50 notes = 10 and Rs 100 notes = 15

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$\huge \sf Solution :$

Let total Rs 50 notes = x

and total Rs 100 notes = y

∴ Total notes = x + y

But we are given total notes = 25

$\sf \implies x+y = 25 \: \: - ①$

Now, Rubina has total money =50x + 100y

But we are given total money =Rs 2000

$\sf \implies 50x+100y=2000$

$\sf \implies 50(x+2y)=2000$

$\sf \implies x+2y = \dfrac{2000}{50}$

$\sf \implies x+2y = \dfrac{\cancel{2000}^{40}}{\cancel{50}}$

$\sf \implies x+2y = 40 \: \: - ②$

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On substraction of ① and ②,

(x+y) - (x+2y) = 25 - 40

x + y - x - 2y = - 15

- y = - 15

$\boxed{\sf y = 15}$ ⠀

Now, by putting y in ①,

x+y=25

x + 15 = 25

x = 25 - 15

$\boxed{\sf x=10}$

∴ Rs 50 notes, x = 10

and Rs 100 notes, y = 15