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.
You don't have to search very far. 3.12 IS a rational number.
Answer:
Total distance traveled in all = 220 miles
Average speed for the entire trip = 44 miles per hours
Step-by-step explanation:
Don't have one
Answer:
what’s the inequality? I only see the value of 20
Explanation:
Answer:
use math-way. it helps a lot !
Step-by-step explanation: