Question

a sum of rupees 800 is in the form of denominations of rupees 10 and 20 if one of the number of nodes is 50 find the number of notes of each type

Answer 1

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Let,
no. of 10 rupee notes = x
no. of 20 rupee notes = y
given,
either x or y is 50
sum is 800
10x+20y = 800
Case 1
x = 50
10 (50) + 20y = 800
500 + 20y = 800
20y= 300
y = 15
Case 2
y = 50
10x + 20 (50) = 800
10x + 1000 = 800
10x = -200
this case is not possible
therefore no. of 10 rupee notes - 50
no.of 20 rupee notes - 15


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