Please explain this to me. Thank you

Suppose you are trying to calibrate a medical instrument and notice that you have errors in your measurements that are seemingly random with an average error of 0.07 and a variance of 0.00011. What is the largest possible value of the probability that your random error is more than 0.035 away from the average, that is the probability that your error is more than 0.105 or less than 0.035? Use Chebyshev's inequality to compute the upper bound. 0 0.09 O 0.15 O 0.24 O 0.47