Answer:
The correct option is b.
Step-by-step explanation:
The formula for standard deviation is

where,
is mean of the data and n is number of observation.
The variance of a stock's returns can be calculated by the above formula.
Variance of stock's returns is the average value of squared deviations from the mean.
Therefore the correct option is b.
0.98 as a unsimplified fraction would be 98/100. The simplified fraction would be 49/50 hope this helped
0.85 written as a fraction in simplest form is 17/20
Answer:
( -0.5 , 6.5 )
Step-by-step explanation: