Answer:
Warranty of 66 months.
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean 
and standard deviation 
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
If the company wants no more than 2% of the components to wear out before they reach the warranty date, what number of months should be used for the warranty?
Only the lowest 2% will be replaced, so the warranty is the value of X when Z has a pvalue of 0.02. So it is X when Z = -2.055.
Warranty of 66 months.
Answer: 1 Brutus Bites= $9.25
1 Lucky Licks= $8.00
Step-by-step explanation:
2B + 3L= 42.50
5B + 6L= 94.25
Using the elimination method multiply the first equation by -2 to cancel the L's out.
5B + 6L= 94.25
-4B - 6L= -85
B= 9.25
Then put this number back into the equation to solve the other.
2B + 3L = 42.5
5B + 6L = 94.25
2(9.25) + 3(8) = 42.5
5(9.25) + 6(8) = 94.25
Answer:
4, 11, 4/11
Step-by-step explanation:
there are 5 white marbles, 4 yellow marbles, and 2 green marbles.
there are 11 marbles in total, and 4 yellow marbles
the probability of her selecting a yellow marble is 4/11
Answer:
7
Step-by-step explanation:
+ 18 = 67
<u><em>You first need to subtract 18 from both sides:</em></u>
<u><em /></u> + 18 = 67
- 18 -18
_________
= 49
<u><em>To get rid of the square, you need to square root both sides:</em></u>
<u><em /></u> = 49
<u><em>This leaves you with:</em></u>
x = 7
