Hi, 

A student gets 4 points for a correct answer, but loses 3 points for an incorrect answer. 

A history exam with 100 multiple choice questions.

Let x and (100-x) represent the number right and wrong respectively

Question states***scored a total of 225 points

 4x -3(100-x) = 225

      x = 75, the number answered correctly, 25 answered incorrectly 

RELATED QUESTIONS

A student is taking a standardized test consisting of multiple choice questions for which  (answered by Edwin McCravy)

on a multiple choice exam, a college instructor gives 2 points for a correct answer and... (answered by josgarithmetic)

Deandre's final exam has true/false questions, worth 4 points each, and multiple choice... (answered by rothauserc)

Each question of a 5-question multiple choice exam has 3 possible answers.  Suppose a... (answered by stanbon)

7. In a multiple-choice test, each question has four options. Students will get 4 points... (answered by stanbon)

In a multiple-choice test, each question has five options. Students will get 3 points for  (answered by robertb)

A history quiz had 8 multiple choice questions.  Each question has 4 answer choices.  A... (answered by stanbon,Boreal)

A multiple-choice test has 6 questions. Each question has 5 choices and only one of which  (answered by ikleyn)

Each question of a 5-question multiple choice exam has possible answers. Suppose a... (answered by jorel555)