0.75 is 3/4 and 3 is 3 so the mixed number is 3 3/4
A. 0.250006, 0.250007, 0.250008
b. 0.3330001, 0.3330002, 0.3330003
z = -2.83
<u>Explanation:</u>
Given:
Mean, μ = 68
Standard deviation, σ = 6
Data point, x = 51
Z score, z = ?
We know:

Substituting the value we get:

A negative z score says that the data point is below average.
The answer is 61.92 all u do is 3 x 20.64