30 = 2 * 3 * 5
<span>48 = 2⁴ * 3
</span>
<span>60 = 2² * 3 * 5
</span><span>GCF = 2 * 3 = 6</span>
Answer: 7/21 is the answer because 7 * 2 = 14 and 21*2=42
Step-by-step explanation:
Using it's concept, the standard deviation for the given data-set is of 8.22.
<h3>What are the mean and the standard deviation of a data-set?</h3>
- The mean of a data-set is given by the <u>sum of all values in the data-set, divided by the number of values</u>.
- The standard deviation of a data-set is given by the square root of the <u>sum of the differences squared between each observation and the mean, divided by the number of values</u>.
The mean for this problem is:
M = (17 + 26 + 28 + 9 + 30 + 29 + 6 + 21 + 23)/9 = 21
Hence the standard deviation is:

More can be learned about the standard deviation of a data-set at brainly.com/question/12180602
#SPJ1
Km pretty sure it’s C (the third one )