One question

a school purchases boxes of candy bars.
each box contains 50 candy bars.
each box costs $30.
how much does the school have to charge for each candy bar to make a profit of
$10 per box?

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f