Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
A biased four-sided die has probabilities
P
(
1
)
=
0.2
P(1) = 0.2
P
(
1
)
=
0.2
,
P
(
2
)
=
0.35
P(2) = 0.35
P
(
2
)
=
0.35
,
P
(
3
)
=
0.25
P(3) = 0.25
P
(
3
)
=
0.25
,
P
(
4
)
=
0.2
P(4) = 0.2
P
(
4
)
=
0.2
. The die is rolled 400 times. Find the expected number of times the die shows a 2.
Browse the problem library