y 1 2 3 4 5 7 8 P(Y = y) 0.033 0.124 0.202 0.214 0.1287 0.105 0.099 0.0543 0.04 Use random-variable notation to express each of the following events. The number of busy lines is а. ехаctly five. c. between two and six, inclusive. d. at least one. Apply the special addition rule and the probability distribution to de- b. at least five. termine f. P(Y <5). h. Р(Y > 1). е. Р(Y — 5). g. P(1 < Y < 6).

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18. Busy Phone Lines. An administrative office has eight incoming
telephone lines. The probability distribution of the number of busy
lines, Y, is as follows.
y
1
2
3
4
6 7 8
P(Y = y) 0.033 0.124 0.202 0.214 0.1287 0.105 0.099 0.0543 0.04
Use random-variable notation to express each of the following events.
The number of busy lines is
а. ехаctly five.
c. between two and six, inclusive.
Apply the special addition rule and the probability distribution to de-
termine
b. at least five.
d. at least one.
f. P(Y < 5).
h. Р(Y > 1).
е. Р(Y — 5).
%3D
g. P(1 < Y < 6).
Transcribed Image Text:18. Busy Phone Lines. An administrative office has eight incoming telephone lines. The probability distribution of the number of busy lines, Y, is as follows. y 1 2 3 4 6 7 8 P(Y = y) 0.033 0.124 0.202 0.214 0.1287 0.105 0.099 0.0543 0.04 Use random-variable notation to express each of the following events. The number of busy lines is а. ехаctly five. c. between two and six, inclusive. Apply the special addition rule and the probability distribution to de- termine b. at least five. d. at least one. f. P(Y < 5). h. Р(Y > 1). е. Р(Y — 5). %3D g. P(1 < Y < 6).
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