Answer:
13.5%
Step-by-step explanation:
From this question we have the following information
We have mean return = 10
Standard deviation = 5
We use this formula
Z = x - mean/standard deviation
X is between 15 and 20
15< X< 20
= 15-10/5 < Z < 20-10/5
= 1 < z < 2
Using the Statistical table,
P(z < 2) = 0.9772
P(z< 1) = 0.8413
0.9772 - 0.8413 = 0.1359 x 100
= 13.5%
The probability of JQH stock providing a return within the range 15% to 20% = 13.5%
Thank you