SOLUTION: A student scores 90% on a 20 question test. Use a percent equation to write the ratio of the actual number of questions answered correctly to the actual total number of questions.
Algebra.Com
Question 1062127: A student scores 90% on a 20 question test. Use a percent equation to write the ratio of the actual number of questions answered correctly to the actual total number of questions. how do i do this?
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
Let P = the percentage score, expressed as percentage
Let c = number of correct answers
Let n = total number of questions
P = (c/n) * 100
[ "Percent" literally means "per 100" so given, say, 90%, you can also write that as 90/100 or 0.90 ]
In this specific question, number of correct answers = 90% * 20 = 0.90*20 = 18
So the score 90% = (18/20)*100
I hope this makes sense. Just remember that percent is the same as "per 100" and that people use it as a convenient way of scoring/measuring/quantifying things. Also, remember that given a value expressed as a percentage (i.e. with the % sign following the number) you can simply divide that number by 100 to convert to a decimal that you can use in your calculations.
RELATED QUESTIONS
On a test a student missed 8 of 70 questions. What percent of the questions, rounded to... (answered by Fombitz)
75 percent of a class answered the first question on a certain test correctly, 55 percent (answered by anand429,MathTherapy)
A student correctly answered 80% of the 20% questions on the test. How many questions did (answered by zoomkaboom4)
A test consists of 10 true/false questions. To pass the test a student must answer a... (answered by greenestamps)
Hello, i do not understand how to answer these two similar questions
#1 Jamie earned... (answered by macston)
on An Algebra Test A Student Answered 25 questions but did not pass. on a second attempt, (answered by ewatrrr)
a test consist of 10 true and false questions. To pass the test a student must answer at... (answered by edjones,ewatrrr)
A test consists of 10 true/false questions. To pass the test a student must
> answer at (answered by jjordan95)
A test consists of 10 true/false questions. To pass the test a student must answer at... (answered by solver91311)