Answer:
70.19% probability that on a given day the supermarket will sell below 449 gallons of milk.
Step-by-step explanation:
Problems of normally distributed samples can be 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:
What is the probability that on a given day the supermarket will sell below 449 gallons of milk?
This is the pvalue of Z when X = 449. So
has a pvalue of 0.7019.
So there is a 70.19% probability that on a given day the supermarket will sell below 449 gallons of milk.
Step-by-step explanation:
we multiply both sides by the denominator on the right to eliminate fraction, so we have..
p*(n+a)= (n²+a/n+a)*n+a
so we have
p(n+a)= n²+a
so opening the bracket on the left hand side we have,
p*n+p*a
pn+pa
so,
pn+pa= n²+a
so collecting like terms we have,
pn-n²= a-pa
so removing a from the equation on the right hand side we have,
pn-n²=a(1-p)
dividing both sides by the equation in the bracket on the right hand side, we have..
pn-n²/(1-p)= a
a = pn-n²/1-p
or
a = n(p-n)/1-p
Its the last option they both are as far from 0 on the number line
Hope this helps and good luck on ur guyss exams :)
Answer:
is there supposed to be a picture?
Step-by-step explanation: