Using Chebyshevs theorem, solve these problems for a distribution with a mean of 80 and a standard

Question:

Using Chebyshev’s theorem, solve these problems for a with a mean of 80 and a standard deviation of 10.
a. At least what percentage of values will fall between 60 and 100? 75%
b. At least what percentage of values will fall between 65 and 95? Distribution
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