Complete Question:
A total of 442 tickets were sold for the school play. They were either adult tickets or student tickets. There were 58 fewer
There were 58 fewer student tickets sold than adult tickets. How many adult tickets were sold?
Answer:
250 adults tickets
Step-by-step explanation:
Given
Represent Adult with A and Children with C
Required
Find A
Since the ticket were either bought by A or C; then
This gives:
Substitute C + 58 for A
Collect Like Terms
Divide through by 2
Recall that:
Hence, 250 adults bought the ticket
There were 192 adult tickets and 250 student tickets sold for the school play, totaling 442 tickets.
Complete question should be:
How many adult tickets and student tickets were sold for the school play if a total of 442 tickets were sold, and there were 58 fewer adult tickets than student tickets?
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Answer: 50
Step-by-step explanation:
f(250) = ?
Is asking, "What is the frequency (number of trees) that have a height of 250"
Look at the graph to see that when x = 250 (height), y = 50 (trees).
Therefore, f(250) = 50
Answer:
Zero
Step-by-step explanation:
Given that:
the true mean is 50 and we reject the hypothesis that μ = 50
The probability of the Type II error will be zero, given that we reject the null hypothesis. This has nothing to do with if it is true or false.
Type II error is occurs when you accept a false null hypothesis. The probability of this error is denoted by beta which relies on sample size and population variance.
The probability of rejecting is equal to one minu beta. i.e it is the researchers goal to reject a false null hypothesis.
Answer:
b. A binomial variable with 25 independent trials
Step-by-step explanation:
The conducted experiment is binomial experiment because outcome can be divided into success or failure. The success would be the people who read novel in the past year and also responses are independent of each other. We have to find the number of trials n in the given problem.
we are given that variance of R=6 and p=probability of success=0.4.
We know that variance of binomial distribution is
Variance=npq
where q=1-p=1-0.4=0.6.
By putting the values in variance formula, we can get the value of n.
6=n*0.4*0.6
6=0.24*n
n=6/0.24
n=25
Hence, random variable R is a binomial variable with 25 independent trials.
much was each eraser?
Answer:
$4
Step-by-step explanation:
First, 22-6=16, this isolates how much she spent on erasers alone
Then, 16/4=4, if she bought 4 erasers each one would have cost $4
Step-by-step explanation:
5 dollars and 5 cents.
Answer:
3 feet wide and 9 feet long.
Step-by-step explanation:
The classroom wall has an area of .
The fire code requirements allow a bulletin board with an area of at most 30% of . This means that the maximum area of the bulletin board is
Let L and W be the length and wide of the bulletin board.
If the length of the board is three times as long as the width, then L=3W, and the area of the board is
For the largest board we have,
So, the largest bulletin board that meets the fire code is 3 ft. wide and 9 ft. long.