Answer:
There are 15 problems worth 4 points on the test.
Step-by-step explanation:
We can determine this by subtracting the number of 2-point questions from the total number of questions:
35 total questions - 20 questions worth 2 points
Which makes the equation 35-20. After using the information we have and the new information we've got, that gives use the answer.
35 - 20 = 15
Therefore, there are 15 questions worth 4 points on the chapter test.