Question

Xio just took a math test with 25 questions, each worth an equal

number of points.
The test is worth 100 points total. If a score of 70
points earns a grade of C, how many questions would Xio need to get
right to get a grade a of C on the test?

Answer 1

18 correct to get a grade of a c

Answer 2

X = number of points per question
25 * x = 100
x = 100/25
x = 4
let y = number of questions right
70 = y*4
y= 70/4
y = 17 r 2
Must round up to fall in the grade boundary:
= 18 question right