The scores on an exam are normally distributed with a mean of 77 and a standard deviation of 10. what percent of the scores are greater than 87?

68%
16%
84%
2.5%

 16%

Step-by-step explanation:

Given: The scores on an exam are normally distributed.

Mean :

Standard deviation=

Let X = 87

Then,

Now, the probability of scores are greater than 87 is given by :-

Since,

Then,

In percent ,

c. (3,2,6) is the answer.

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80