Question

9 19 20 20 21 21 22 22 F(x) F ( x ) 24 24 2...

9
19
20
20
21
21
22
22
F(x)
F
(
x
)
24
24
2
2
6
6
7
7
1
1


Let x
x
be the ages of students in a class. Given the frequency distribution F(x)
F
(
x
)
above, determine the following probabilities:
(a) P(18≤x<20)=
P
(
18
≤
x
<
20
)
=

(b) P(x=18)=
P
(
x
=
18
)
=

(c) P(x>19)=
P
(
x
>
19
)
=

RandomVariables:



x
18
19
20
20
21

F(x)

24
2
6
7
1


Let x
be the ages of students in a class. Given the frequency distribution F(x) above, determine the following probabilities:
(a) P(18≤x<20)=

(b) P(x=18)=
(c) P(x>19)=

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