There are 40 houses in a neighborhood.Company X provides electricity to 1/8 of the houses ,how many houses does Company X provid
1 answer:
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Answer:
see below
Step-by-step explanation:
The ratio of terms that are two terms apart (s4 and s6) is the square of the common ratio:
s6/s4 = r^2
r = √(8/18)
r = 2/3 . . . . . matches choices A and C
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Using the formula for the general term, we now know enough to find the first term:
sn = s1·r^(n-1)
s4 = s1·(2/3)^(4-1)
Using s4 = 18 and multiplying by (2/3)^-3, we get ...
18·(2/3)^-3 = s1 = 18·27/8
s1 = 243/4 . . . . . matches choice A
The two dice have PMFs
The sum of the two rolls can take on 8 different values:
The outcome of either roll is independent of the other, so that
a. Then PMF of is
b. The histogram is nothing special, same as the discrete uniform distribution over the interval [0, 7].
