Answer:
0.6069
Step-by-step explanation:
Given an approximately normal distribution:
Z = (x - mean) / standard deviation
Mean = 69.3 ; Standard deviation = 2.58
For :
P(x < 70)
Z = (70 - 69.3) / 2.58
Z = 0.7 / 2.58
Z = 0.2713
P(Z < 0.2713) = 0.6069
The answer is no, I think
For a direct variation, f(x) = kx. Therefore, for f(x) = 30x, constant of variation (k) = 30.
Well 57+59+61= 177 so the answer is 57
