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Question

A worker is paid Rs100 per day for attending work and fined Rs50 on the day of his absence. If in a month of 30 days, he earns Rs2400, for how many days was he absent?

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Solution

No of days he came let be x

no of days absent be y
x+y=30

100x50y=2400

2xy=48 equation 1
x+y=30 equation 2

adding 1 and 2
3x=78
x=26
y=4
no of days he was absent is 4 days
So the correct answer is 4.

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