Homework Help: math

Posted by jonathan on Saturday, December 15, 2007 at 9:20pm.

there are 50 question in a test. a student gains 2 marks for a correct anwser and loses 1 mark otherwise. if a student has 76 marks, how many question did he answer incorrectly?

math - Jon, Saturday, December 15, 2007 at 9:23pm
This is fairly easy just use alittle more effort and someone will check your answer.
math - DrBob222, Saturday, December 15, 2007 at 9:26pm
i = # incorrect (or otherwise) answers
c = # correct answers
========================
i + c = 50
-1 + 2c = 76
================
Solve the two equations simultaneously.
Post your work if you get stuck.
- math - DrBob222, Saturday, December 15, 2007 at 9:27pm
  Check my thinking. Check my work.

Answer this Question

Related Questions

statistics - A student is taking a multiple choice test where each question have...
statistics - 10. A student is taking a multiple choice test where each question ...
statistics - Student A gets 40%maxmium marks and 10 above pass mark.Student B ...
statistics - a test consists of true/false questions .to pass the test a student...
advanced statistics - suppose a student takes a multiple choice test with 10 ...
math 12 - The mean and standard deviation of a set of data are two measurments ...
Math - A student got these marks on 7math tests: 91%,75%,95%,,80%,83%,86%,68% ...
math - A multiple-choice test has 10 questions. Each question has 5 choices. If ...
Statistics - A student studies for a statistics exam where all questions are ...
Computer - Assume that a computer is to decide whether a student passes or fails...

For Further Reading

First Name:
School Subject:
Answer: