The admission fee at a small fair is 1.50 foe chikdren and 4.00 for an adult. On a certain day 5050 is collected if 1000 adults attened the fair

Im assuming the rest of your question is: how much was collected for children? if thats the case your answer will be this;

1000*4=4000 (adult total in admission)

5050-4000=1050 (children total in admission)

1050:1.50=700 (kids went to the fair.)