Answer:
17 number of 3 marks problems
Step-by-step explanation:
Given that in a Math test total number of points is 111.
Out of these questions there would be a mixture of 4 marks and 3 marks questions.
Let x have 3 marks and y 4 marks problems
Since total number of questions =32
we have x+y =32 ...i
Since total points = 111, we have
3x+4y =111 ...ii
Multiply i by -3 and add with ii
y = -96+111=15
x=17
VErify:
There 17, 3 marks questions and 15, 4 marks questions
Total question = 32
Total points = 17(3)+15(4)=111
Verified
