0.77875...
which, I'm assuming, they want you to round to the nearest hundredth? So, .78?...
You multiply 86 by 42.5 because each board is 42.5 and there are 86 boards.
We have the following data set:
2,7,15,3,12,9,15,8,3,10
The range is the difference between the highest and lowest values in the set, to find the range, order the data set from least to greatest.
2,3,3,7,8,9,10,12,15,15
Then,

Mean is represented by the following expression:


Population variance formula looks like this:

Then, substituting:

For the standard deviation:
Diversification means wide variety of different investment options available in the portfolio so that it becomes lesser risky towards minimizing losses in down market.
It provides better protection towards common issues like inflation, market instability, war effects, hike in exchange rates, interest rates reduction etc. So, we can conclude that :-
Diversification is the method to make investments less vulnerable to a catastrophic loss.
Hence, option A is best answer from given choices.
Answer:
x = 6
Step-by-step explanation: