<span>3x+12-5(x)=22 your answer is -5</span>
Answer:
Probability that their mean credit card balance is less than $2500 is 0.0073.
Step-by-step explanation:
We are given that a bank auditor claims that credit card balances are normally distributed, with a mean of $3570 and a standard deviation of $980.
You randomly select 5 credit card holders.
Let<em> </em>
<em> = </em><u><em>sample mean credit card balance</em></u>
The z score probability distribution for sample mean is given by;
Z =
~ N(0,1)
where,
= population mean credit card balance = $3570
= standard deviation = $980
n = sample of credit card holders = 5
Now, the probability that their mean credit card balance is less than $2500 is given by = P(
<em> </em>< $2500)
P(
<em> </em>< $2500) = P(
<
) = P(Z < -2.44) = 1 - P(Z
2.44)
= 1 - 0.9927 = 0.0073
The above probability is calculated by looking at the value of x = 2.44 in the z table which has an area of 0.9927.
Therefore, probability that their mean credit card balance is less than $2500 is 0.0073.
7/7 - 4/7 = 3/7
This is the relationship between the quantities
<h3>
Answer: 4/5</h3>
Explanation:
We have 24 adults who passed and 16 teens who passed. So 24+16 = 40 people passed total.
There are 24+8+16+2 = 50 people total
If you pick someone at random, the probability of them passing is 40/50 = 4/5.
In decimal form, this is 4/5 = 0.80 which converts to 80%