Five consecutive two-digit positive integers, each less than 30, are not prime. What is the largest of these five integers?
2 answers:
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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 .
Answer:
Step-by-step explanation:
c + a = 342 ..................... <em>(1)</em>
5c + 12a = 2550 ........... <em>(2)</em>
- 5 × <em>(1)</em> + <em>(2)</em>
7a = 840
<em>a = 120</em>
<em>c</em> = 342 - 120 <em>= 222</em>
