The class mean score on a test was 60, and the standard deviation was 5. If Jack's score was within 2 standard deviations of the mean, what is the lowest score he could have received? Choose the correct choice from the following answers.
A) 30 B) 31 C) 45 D) 40 E) 89
1 SD from the mean is ADDING and Subtrating the amount if standard deviation from the mean one time. 2 SD from the mean is ADDING and Subtracting TWICE.   1SD from the mean ranges from 65 to 55, where 65 is within SD above the mean and 55 within 1SD below the mean   2SD=5 TWICE=10 from the the mean, which is 70 to 40, where 70 is within 2 SD above the mean AND 40 is within 2 SD below the mean.   Answer = 40
<result>D</result>
The class mean score on a test was 60, and the standard deviation was 5. If Jack's score was within 2 standard deviations of the mean, what is the lowest score he could have received?