Using the binomial distribution, it is found that there is a 0.7941 = 79.41% probability that at least one of them is named Joe.
For each student, there are only two possible outcomes, either they are named Joe, or they are not. The probability of a student being named Joe is independent of any other student, hence, the <em>binomial distribution</em> is used to solve this question.
<h3>Binomial probability distribution
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The parameters are:
- x is the number of successes.
- n is the number of trials.
- p is the probability of a success on a single trial.
In this problem:
- One in ten students are named Joe, hence
.
- There are 15 students in the class, hence
.
The probability that at least one of them is named Joe is:

In which:


Then:

0.7941 = 79.41% probability that at least one of them is named Joe.
To learn more about the binomial distribution, you can take a look at brainly.com/question/24863377
Answer:
3
Step-by-step explanation:
because divide Pt from both sides to get r=i/(pt)
The <u> nominal return </u>on an investment doesn't consider the effect of inflation on purchasing power. If the inflation rate is positive, then the real return will be <u> less than </u> the nominal return on an investment.
Positive inflation eats away at the value of the dollar. For instance, an item worth $100 one year could be worth $105 the next year if inflation was 5%. Therefore, you've lost 5 dollars worth of purchasing power (since you need 5 extra dollars to get the same item).
The formula is
real return = nominal return - inflation
If inflation is positive, then the real return is smaller than the nominal return.
If inflation is negative (ie we have deflation), then the real return is larger than the nominal return.
Answer:
There is no slope therefore its undefined
Step-by-step explanation: