Please help! Will mark brainliest if correct! Please explain how you got this answer. Worth 25 points!

There are 12 boy and13 girls in a class. if the teacher randomly chooses a student’s name out of a hat what is the probability it will be a girl

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?