Question: The random variable X takes only the values 10 and 20, each with equal probability. The upper bound we get for the probability P(12

The random variable X takes only the values 10 and 20, each with equal probability.

The upper bound we get for the probability P(12 ≤ X ≤ 18) from Chebyshev’s inequality is 25∕9.f(x) = c Rx = {1,2,3}. 9

Then the value of c is

(a) 2

(b) 9∕14

(c) 4

(d) 1∕4 (e)1∕2

f(x) = c Rx = {1,2,3}. 9

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