When you read several things, you always read them in a certain order, so: The probability that the 1st one the student read was a dance class is 5/8. The probability that the 2nd one the student read was a dance class is 4/7. The probability that the 3rd one the student read was a dance class is 3/6. The probability that the 4th one the student read was a dance class is 2/5.Edwin