1. Find the mean : 12 , 8 , 7 , 10 , 8 , 8 , 10
A. 63
B. 12.6
C. 9
D. 7
2. The sixth-grade classes have 28,20,30, and 25 students. What is the mean number of students in class?
A. 25.75
B. 26.25
C. 25
D. 27
3. The mean of four numbers is 30. If three of the numbers are 12,50, and 48 , what is the fourth number?
A. 120
B. 10
C. 12
D. 30
4. Carlos recorded the temperature in his town for 6 days. He got the following results: 45,47,71,50,49, and 52. Which temperature is the outlier?
A. 45
B. 49
C. 52
D. 71
5. Cindy asked her friends how many times they had watched a particular movie with the results of 1,0,1,3,2, and 7. What is the mean of this set of date without the outlier?
A. 1.4
B. 1.75
C. 2.3
D. 2.8
Please help! I'm rlly bad at math- ;-;
1.C
2.A
3.B
4.D
5.A
I hope this helps!
No problem! I can help you with these math questions. Let's go through each question step by step:
1. To find the mean, you need to sum up all the numbers and then divide by the total count. Let's do that:
Mean = (12 + 8 + 7 + 10 + 8 + 8 + 10) / 7
= 63 / 7
= 9
So, the mean is 9.
Answer: C. 9
2. To find the mean number of students in class, you need to sum up the number of students in each class and then divide by the total number of classes. Let's do that:
Mean = (28 + 20 + 30 + 25) / 4
= 103 / 4
= 25.75
So, the mean number of students in class is 25.75.
Answer: A. 25.75
3. The mean of four numbers is given as 30, and three of the numbers are 12, 50, and 48. To find the fourth number, we can use the formula for the mean:
Mean = (12 + 50 + 48 + Fourth Number) / 4
30 = (12 + 50 + 48 + Fourth Number) / 4
120 = 110 + Fourth Number
Fourth Number = 120 - 110
= 10
So, the fourth number is 10.
Answer: B. 10
4. To identify the outlier in a data set, you can look for the value that is significantly different from the others. In this case, you can compare the given temperatures: 45, 47, 71, 50, 49, and 52. The temperature 71 is significantly higher than the others, so it is the outlier.
Answer: D. 71
5. To find the mean of a data set without the outlier, you need to find the sum of the remaining numbers and then divide by the count. Let's do that:
Mean = (1 + 0 + 1 + 3 + 2) / 5
= 7 / 5
= 1.4
So, the mean of the data set without the outlier is 1.4.
Answer: A. 1.4
I hope this helps! Let me know if you have any other questions.
No worries! I'm here to help you with these math questions. Let's go through each question step by step to find the correct answers.
1. To find the mean of a set of numbers, you need to sum all the numbers together and then divide the sum by the total number of values. In this case, the sum of the numbers is 12 + 8 + 7 + 10 + 8 + 8 + 10 = 63. Since there are 7 numbers in the set, you divide 63 by 7 to get the mean: 63/7 ≈ 9. Therefore, the correct answer is C. 9.
2. To find the mean number of students in class, you need to sum all the numbers (number of students in each class) together and then divide the sum by the total number of classes. In this case, the sum of the numbers is 28 + 20 + 30 + 25 = 103. Since there are 4 classes, you divide 103 by 4 to get the mean: 103/4 = 25.75. Therefore, the correct answer is A. 25.75.
3. To find the fourth number when the mean and three other numbers are given, you need to use the formula for the mean: Mean = (sum of numbers) / (number of numbers). In this case, the given mean is 30, and the sum of the three numbers (12, 50, and 48) is 12 + 50 + 48 = 110. Let's denote the fourth number as "x". Now we can set up an equation: 30 = (110 + x) / 4. Solving for x, we get 110 + x = 30 * 4, which simplifies to 110 + x = 120. Subtracting 110 from both sides, we find x = 120 - 110 = 10. Therefore, the correct answer is B. 10.
4. To identify the outlier in a set of numbers, you need to compare each number to the others and see if it stands out as significantly different. In this case, the numbers are 45, 47, 71, 50, 49, and 52. By looking at the set, we can see that 71 is much higher compared to the other numbers. Therefore, the correct answer is D. 71.
5. To find the mean of a set of numbers without an outlier, you need to calculate the mean after removing the outlier. In this case, the numbers are 1, 0, 1, 3, 2, and 7. By looking at the set, we can see that the outlier is 7 since it is significantly higher compared to the other numbers. Now we can calculate the mean by summing the remaining numbers (1, 0, 1, 3, and 2) together and dividing the sum by the total number of values (5). The sum is 1 + 0 + 1 + 3 + 2 = 7, and 7 divided by 5 is 1.4. Therefore, the correct answer is A. 1.4.
I hope this helps! Let me know if you have any further questions.
Oh 'kay!
Tysmm @O K here !