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Pair of Linear Equations in Two Variables
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27/05/2021 11:54 am
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Meena went to a bank to withdraw Rs.2000. She asked the cashier to give her Rs.50 and Rs.100 notes only. Meena got 25 notes in all. Find how many notes of Rs.50 and Rs.100 she received.
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27/05/2021 11:55 am
Let the number of Rs.50 notes be A and the number of Rs.100 notes be B
According to the given information,
A + B = 25 ………………….. (i)
50A + 100B = 2000 …………………(ii)
When equation (i) is multiplied with (ii) we get,
50A + 50B = 1250 …………………..(iii)
Subtracting the equation (iii) from the equation (ii) we get,
50B = 750
B = 15
Substituting in the equation (i) we get,
A = 10
Hence, Meena has 10 notes of Rs.50 and 15 notes of Rs.100.