Question

rita has only 100 ruppes note and 50 rupees note .she has 7000 in total. the ratio of 100 rupees note to 50 note is5:4. how many notes of each does she have?



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Answer 1

Step-by-step explanation:

Let the number of 100 rupee notes be x and 50 rupee notes be y.

According to first condition,

100x + 50y = 7000

2x + y = 140 ------ 1

According to second condition,

$\frac{x}{y} = \frac{5}{4}$

4x = 5y

4x - 5y = 0 ------- 2

Multiply equation 1 by 2

4x + 2y = 280 ------- 3

3 - 2,

7y = 280

y = 40

Substitute y in eq 1

2x + 40 = 140

2x = 100

x = 50

She Has 50 Notes Of 100 Rupees And 40 Notes Of 50 Rupees.