Problem 651

The time required to finish a test is normally distributed with a mean of 60 minutes and a standard deviation of 10 minutes. What is the probability that a student…

Problem 649

Find the sum of the following infinite geometric series, if it exists.   Solution:-   S = , where r = common ratio (r ≤ 1) and a = first…

Problem 648

Find the sum of the following infinite geometric series, if it exists.   Solution:-   S = , where r = common ratio (r ≤ 1) and a = first…

Problem 646

Find S11 for 1 + 2 + 4 + 8 + …   Solution:- Sn = *** QuickLaTeX cannot compile formula: \frac{a1(1 - *** Error message: File ended while scanning use of \frac . Emergency stop. r^{n} , Where…