1 a boy was employed on the understanding that he was to receive 'p' paise for everyday he worked and 'q' paise for everyday when there was no work for him after 'd' days his total earnings amounted to rupees x how many days had he worked
If there were w days when he worked, then
x = (pw + q(d-w))/100
100x = pw + qd - qw
w = (100x-qd)/(p-q)