Can somone plzz help

In an experiment you are to flip a two sided coin 100 times and record 55 heads up and 45 tails up determine the theoretical and experimental probability of getting a heads up in the experiment.

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.