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?

Answer 1

No of days he came let be x

no of days absent be y

$x+y=30$

$100x-50y=2400$

$2x-y=48$ 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.