It should be 0.4 :) Hope this helps!
Answer:
B
Step-by-step explanation:
Divide both 28x and -4 by 4 because a square has 4 equal sides. That comes out to 7x-1, therefore answer B is correct.
Answer:
a) Mean = 2.6
B) Variance = 9.2
Step-by-step explanation:
We are given the following probability mass function in the question:

a) Mean of random variable

b) Variance of the random variable

Answer:
the answer for first question is $112.
the answer for second question is 16 trips.
Step-by-step explanation:
Hope it helps you!!