W=cost of one ticket
6w=$4
divide 6 on both sides
w=2/3 dollars per ticket
each child will get two tickets because 6/3 is 2
2/3×2= 4/3= $1.33 per child
It can be deduced that the probability of having 4 or more correct guesses will be 0.0296.
<h3>How to calculate the probability</h3>
From the given information, the null hypothesis is p = 1/7 and the alternate hypothesis is p>1/7. In this case, the mind reader gets a 4 out of 9 chances.
In order to test the hypothesis, simulations for 10000 cases were run with a probability of the correct answer being 1/7.
In this case, the p-value is the probability of correct answers that are greater than 4, assuming the null hypothesis is true. Here the p-value is 0.0296.
Also, the significance level to reject the hypothesis is less than 0.01. Since p > 0.01, we then fail to reject the hypothesis. Therefore the null hypothesis stands and Joao is not a mind reader.
Learn more about probability on:
brainly.com/question/24756209
<span>3. The measure of each interior angle of P is 90 degrees.</span>
Remark
Before you do anything else, read what she did. She opened the refrigerator door slightly. What would you expect to happen especially on a summer day?
Would you expect the temperature to go up? Warm air is heating up the refrigerator in side and the graph shows the temperature increasing. Is it a straight line or is it something else? It looks like it is increasing to start with and it is non linear.
Now she closes the door and refrigerator begins to cool down. The trip down is a straight line (linear). When that happens, you get your answer for this part of the graph, down and linear.
So the complete answer is door open, temperature rises and is non linear.
The door closes and the temperature falls and the line of the graph is linear.
C <<<<< Answer.
