Math Puzzle Part 3!!!

by **nashko_force** Thu Jun 25, 2009 2:57 pm

Jennifer took a test that had 20 questions. The total grade was computed by awarding 10 points for each correct answer and deducting 5 points for each incorrect answer. Jennifer answered all 20 questions and received a score of 125. How many wrong answers did she have?

* need explanations *
Goodluck guys Very Happy

by **rein_force** Fri Jun 26, 2009 6:24 am

15

20 questions X 10 = 200

15 mistakes X 5 = 75

200 - 75 = 125

by **nashko_force** Fri Jun 26, 2009 7:49 am

Bwahahaha! Very Happy

, sis rein your wrong Razz

, i think you need to read carefully the puzzles something you didnt get Very Happy

, try again and goodluck to you and to all who wants to try Very Happy

by **nices** Sun Jun 28, 2009 1:24 am

==>She had five wrong answers. If Jennifer had answered all 20 questions correctly, she would have scored 200. Since she only scored 125, she must have lost 75 points. Since each incorrect answer results in a total loss of 15 points (10 for not getting it correct and 5 for answering incorrectly) she must have missed 5 questions. 5 x 15 = 75, 200 - 75 = 125. Razz