Answer: Ten
Step-by-step explanation:
The harder part is to make an equation out of the text.
Let x be the number of 3 point questions.
In this case the nu,ber of 4 point questions is (30-x)
They all add up to 100 points.
3x + 4(30-x) =100
Solve for x
x=20
There are 20 three point questions
30-20=10 There are ten four point questions.
Lets check. 20*3 + 10*4 = 60+40=100
There'll be 20 3 points questions and 10 four points questions.
The equation that can be used to solve the question will be
a + b = 30 ...... i
3a + 4b = 100 ...... ii
From equation i, a= 30 - b
3a + 4b = 100
3(30 - b) + 4b= 100
90 - 3b + 4b = 100
b = 10.
There are 10 four points questions.
Therefore, there'll be 20 3 points questions.
Read related link on:
https://brainly.com/question/17253927
