Find the cumulative distribution function

Reference no: EM131369932

The percentage of people (to the nearest 10) responding to an advertisement is a random variable with the following probability distribution:

X(%)	P(x)
0	0.10
10	0.20
20	0.35
30	0.20
40	0.10
50	0.05

a. Show that P(x) is a probability distribution.

b. Find the cumulative distribution function.

c. Find the probability that more than 20% will respond to the ad.

Reference no: EM131369932

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