Use 4 -point bins (96 to 99 , 92 to 95 , etc.) to make a frequency table for the set of exam scores shown below. Include columns for relative frequency and cumulative frequency. 83 89 78 89 97 85 97 80 91 84 98 85 84 94 90 79 81 82 80 81

So, you need to know your vocabulary. "Of" means multiply. So you don't know the "what" part, so put a variable. For the variable, we can put x. Then "equals" means the = sign. So, it would look like this: 3/4x=75. Now you solve x. Divide 4 on both sides and you get 3x=300. Now divide 3 on both sides and you get: x=100
So that means x (or "what") would equal 100.
Sources: my brain
I hope this helps. :-)