Answer:

Step-by-step explanation:

lowest common multiple of 2 and 3 is 6
21×3 = 63
21×2= 42
they are now going to have the same denominator of 6

now u are just gonna add the neumerators and keep the denominator

5.0547x10^8
Is it's scientific notation.
We have been given that at a customer service call center for a large company, the number of calls received per hour is normally distributed with a mean of 150 calls and a standard deviation of 5 calls. We are asked to find the probability that during a given hour of the day there will be between 146 calls and 163 calls.
First of all, we will use z-score formula to find z-score corresponding to 146 and 163.







Our next step is to find percentage of data scores falls between both z-scores.

Using normal distribution table, we will get:


Let us convert our answer into percentage.

Upon rounding our answer to nearest thousandths, we will get:

Therefore, the probability that during a given hour of the day there will be between 146 calls and 163 calls is approximately
.
It would be 160. I think that you just multiply the two numbers.