SOLUTION: HELP!!!!! The mean ACT math score in 2001 was 20.7, with an approximate standard deviation of 6. The approzimate percentage of students that scored above 26.7 on the math portion

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: HELP!!!!! The mean ACT math score in 2001 was 20.7, with an approximate standard deviation of 6. The approzimate percentage of students that scored above 26.7 on the math portion       Log On


   

Question 144245: HELP!!!!!
The mean ACT math score in 2001 was 20.7, with an approximate standard deviation of 6. The approzimate percentage of students that scored above 26.7 on the math portion of the ACT in this year was
a. 16%
b. 68%
c. 34%
d. 2.35%
Please reply back as soon as you can, thanks so much
Answer by nabla(475) About Me  (Show Source):
You can put this solution on YOUR website!
50% of the scores lie below the mean which is 20.7. 20.7+6=26.7 so we are asking what percentage of scores exist above one standard deviation from the mean. In an equation we would get:
100%-(50%+34%)=100%-84%=16%. a.