You took a 20-question test that was scored in this way: 10 points were awarded for each correct answer and 5 points were deducted for each incorrect answer. You answered all 20 questions and received a score of 125 points. How many questions did you answer incorrectly?
2007-05-17 23:14:45 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help
A perfect score would be 200.
Each incorrect answer loses 10+5=15 points.
Thus, the number incorrect is (200-125)/15 = 5.
2007-05-18 13:08:45 · answer #1 · answered by chancebeaube 3 · 0⤊ 0⤋
5.
15x10 = 150
5x-5= -25
____
125
5 incorrect.
2007-05-18 06:24:34 · answer #2 · answered by blissnabob 3 · 0⤊ 0⤋
15 right and five wrong??
tell me if i'm right yunieandlenne@ hotmail .co.uk
2007-05-18 06:19:17 · answer #3 · answered by steph 2 · 0⤊ 0⤋
Five... see work below
2007-05-18 06:26:29 · answer #4 · answered by ckenjoos@sbcglobal.net 2 · 0⤊ 0⤋