Suppose We Obtain a Sample Mean of 80 from a Sample

Multiple Choice

Suppose we obtain a sample mean of 80 from a sample of size 100 from an infinite population with $\sigma=50$ . Then the probability is 0.75 that the error in estimating the population mean using Chebyshev's theorem is:

A) between 30 and 130 .
B) less than 6.
C) between 74 and 86 .
D) less than 10 .