1 7/12 becuase 2 neg is a neg, 1 neg and 1 pos is which is bigger in this case it is pos.
Answer:
14.2, 16.96
Step-by-step explanation:
given is a probability distribution of X
X is discrete taking values as 7, 11, 15 and 19
X 7 11 15 19 total
p 0.10 0.35 0.20 0.35 1
x*p 0.7 3.85 3.0 6.65 14.20
x^2*p 4.9 42.35 45 126.35 218 .60
Hence mean = sum of prob (x) = 14.20


Answer:
9 hours
Step-by-step explanation:
$273/13 hours=$21 per hour
$189/$21 =9 hours