Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 300 or lower followed by selecting a student whose score is 700 or higher on the test?
A)0.0005
B)0.002
C)0.022
D)0.045

Question

Given that on one section of the SAT the mean is 500 and the standard deviation is 100, what is the approximate probability of selecting a student whose score is 300 or lower followed by selecting a student whose score is 700 or higher on the test?​
A)0.0005​
B)0.002
C)0.022
D)0.045

Quizplus · Accepted Answer

The probability of selecting a student whose score is 300 or lower is approximately 0.0005. The probability of selecting a student whose score is 700 or higher is also approximately 0.0005. The probability of selecting both a student whose score is 300 or lower and a student whose score is 700 or higher is approximately 0.0005 * 0.0005 = 0.00000025.

Given That on One Section of the SAT the Mean