You have the numbers 1-25 written on slips of paper. If you choose a slip at random, what is the probability that you will select a number that is divisible by 4?
1/5
6/25***?
4/25
2/3
You have the numbers 1-24 written on slips of paper. If you choose a slip at random, what is the probability that you will NOT select a number that is divisible by 3?
3/8
1/3
5/8
2/3***?
A school orders 800 calculators from a manufacturer. If the probability of a calculator being defective is 1.8%, predict how many calculators are likely to be defective. Round your answer to the nearest whole number.
14
15
144
160
Teesha is in French club. There are 10 freshman, 12 sophomores, 15 juniors, and 30 seniors in the club. The advisor is going to randomly choose one of the members of the club to be a guide for an important visitor.
Find the probability that she will choose a junior or a senior.
15/67
22/67
37/67
45/67***?
Please check? I'm a little confused. Thanks:)
The answers you have chosen are right.
For unanswered problem, .018 * 800 = ?
Oh okay lol I was dividing!;'D The answer is 14.4 but they want whole number so 14:) Thanks a lot PsyDAG!!!
Welcome
For the first question, you have the numbers 1-25 written on slips of paper, and you want to calculate the probability of selecting a number that is divisible by 4. To do this, you need to determine how many numbers between 1 and 25 are divisible by 4, and then divide that by the total number of numbers (25).
To find the numbers divisible by 4, you can start with the smallest multiple of 4 (which is 4 itself) and count in increments of 4. The numbers that are divisible by 4 in the range of 1-25 are: 4, 8, 12, 16, 20, and 24. So, there are 6 numbers in total.
Now, you divide the number of numbers divisible by 4 (6) by the total number of numbers (25) to find the probability. This gives you 6/25.
Therefore, the correct answer is 6/25.
For the second question, you have the numbers 1-24 written on slips of paper, and you want to calculate the probability of not selecting a number that is divisible by 3. To do this, you need to determine how many numbers between 1 and 24 are divisible by 3, and then subtract that from the total number of numbers (24).
To find the numbers divisible by 3, you can start with the smallest multiple of 3 (which is 3 itself) and count in increments of 3. The numbers that are divisible by 3 in the range of 1-24 are: 3, 6, 9, 12, 15, 18, 21, and 24. So, there are 8 numbers in total.
To find the probability of not selecting a number divisible by 3, you subtract the number of numbers divisible by 3 (8) from the total number of numbers (24). This gives you 16.
Now, you divide the result (16) by the total number of numbers (24) to find the probability. This gives you 16/24, which simplifies to 2/3.
Therefore, the correct answer is 2/3.
For the third question, a school orders 800 calculators from a manufacturer, and the probability of a calculator being defective is 1.8%. To predict how many calculators are likely to be defective, you multiply the total number of calculators (800) by the probability of a calculator being defective (1.8%).
To find the number of calculators that are likely to be defective, you can use the formula:
Number of calculators likely to be defective = Total number of calculators * Probability of a calculator being defective
Substituting the given values, you get:
Number of calculators likely to be defective = 800 * 0.018 = 14.4
Since you need to round to the nearest whole number, the number of calculators likely to be defective is 14.
Therefore, the correct answer is 14.
For the fourth question, Teesha is in a French club, and you want to calculate the probability that the advisor will choose a junior or a senior as a guide for an important visitor. To find this probability, you need to determine the number of juniors and seniors in the club and divide it by the total number of club members.
The given information states that there are 15 juniors and 30 seniors in the club, so the total number of juniors and seniors is 15 + 30 = 45.
The total number of club members is the sum of all the class levels: 10 (freshmen) + 12 (sophomores) + 15 (juniors) + 30 (seniors) = 67.
Now, you divide the number of juniors and seniors (45) by the total number of club members (67) to find the probability. This gives you 45/67.
Therefore, the correct answer is 45/67.