Brad average typing rate in words per minute is 21
1260 divided by 60 = 21
(In case you meant 30 minutes)
1260 divided by 30 = 42
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Answer:
The variance of the profile is 0.2179.
Step-by-step explanation:
We are given the following in the question:

Variance of portfolio is given by:


Putting values, we get,

Thus, the variance of the profile is 0.2179.
Answer:
6) -7 + 10 = 3 (3 more; total number doesn't matter)
7) 50w + 20
8) c / 5
9) 5 + 2t
10) 4d + 2d
I didn't see the trick problem!