Answer:
a) 0.45 hours
b)
P( Ron ) = 7/12
P( sue ) = 4/15
P(Ted ) = 3/20
c) 1.22 hours
Step-by-step explanation:
Ron , sue and Ted
mean values = 1, 1/2 , 1/3 hours
a) determine the expected time until only one student remains
E(x) = 9/20 = 0.45 hours
b) Probability that each student is the last student left
P( Ron ) = 7/12
P( sue ) = 4/15
P(Ted ) = 3/20
C) Time until all students are gone
= 146 / 120 = 1.22 hours
attached below is the detailed solution
Answer:
Icosahedron
Step-by-step explanation:
Icosahedron has 20 faces and all the faces are equilateral triangle. Also the faces are congruent and the Icosahedron is one of the five Platonic solids.
So you have to divide 21 by 6 to get what the quotient of those two numbers are, then by doing that you should get 3.5. Then you can times that 3.5 by 10 to get y=35
The answer that is correct is D
Explanation: the girl above me said it and shes verififed sooo
It’s 25 dummy next time be smart