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.

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