The third one! you can see the slope based on what’s before x (1/2), and the intercept, which is 3.
The answer is -7.137x10^-3
Answer: 0.55567
Step-by-step explanation:
Given : A certain brand of refrigerator has a useful life that is normally distributed with mean 10 years and standard deviation 3 years. The useful lives of these refrigerators are independent.
i.e.
Let and are two randomly selected refrigerator's life whose sum will exceed third selected refrigerator .
So that,
Mean
Standard deviation =
Z-score :
Now , The probability that the total useful life of two(i..e n=2) randomly selected refrigerators will exceed 1.9 times the useful life of a third randomly selected refrigerator would be :-
Hence, the required probability is 0.55567.
Answer: Exact Form: a=3√6
Decimal Form: a=1.81712059....
12b-15>21
+15 +15
12b > 36
----- ----
12 12
b = 3