Question

The regular admission at in amusement park is $42. However when 15 or more people go as a group they've received a 40% discount. If you have a group of 30 people going, how much will each admission be? What will be the total for all of the admission be ?

Answer 1

Them telling you there are 30 people is just extra information that's unimportant.  No matter what if there are 15 people or more you get a 40% discount. So you still just calculate 40% off of $42.