Answer:
2/3
Step-by-step explanation:
Reduce the fraction with 3
1/3 + 1/3
Write all numerators above the common denominator
1+1 / 3
Add the numbers
2/3
Answer:
1. The first one is 1/4
2. The 2nd one is 2/5
Step-by-step explanation:
This answer is right because I'm like that.
The values that exist two standard deviations above and below the mean are 681 and 265.
<h3>How to determine the values?</h3>
The given parameters exist:
Mean = 473
Standard deviation =104
The values above and below the mean exist calculated utilizing:

In this case n = 2.
So, we have, 
The value above is:
x = 473 + 2
104 = 681
The value below is:
x = 473 - 2
104 = 265
Therefore, the values that exist two standard deviations above and below the mean are 681 and 265.
To learn more about standard deviation refer to:
brainly.com/question/937592
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