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The mean of n numbers is 5 If the number 13 is now included with the n numbers the new mean is 6 Find the value of n?
Wiki User
∙ 14y ago
The mean of N numbers is the sum of those numbers divided by N. If you include 13 in that set and the new mean is 6, then the original N is 7. Let X be the original sum. You have a system of two simultaneous equations. 1.) X/N = 5 2.) X+13/N+1 = 6 To solve, substitute the value of X from eq. 1 into eq. 2 and then solve eq. 2 for N. (Some steps combined) X = 5N
5N+13 = 6(N+1)
5N = 6N-7
-N = -7
N = 7
Wiki User
∙ 14y ago
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How do you find absolute value of positive and negative numbers?
To find the absolute value of a positive number all the answer is is the number in between the lines. For example, the absolute value of [340] is 340. To find the absolute value of a negative number, it is simply the opposite (positive version) of the negative number. For example, the absolute value of [-56] is just 56.
How do you do mean medium mode and range?
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How do you find a median if there is 8 numbers?
List the numbers in numerical order. You are looking for the middle number. In this case it will be the number halfway between the 4th and 5th number. Add the 4th and 5th numbers and divide them by 2, or find the number exactly halfway between the 4th and 5th numbers. So if your 4th number was 12 and your 5th number was 16, then the value halfway between them or the number that is half of the value when you add the two together is 14. That is the median.
How does a number line help you find the smaller value of two numbers?
Since the numbers on a number line increase from left to right, it follows that any number to the left of another number is smaller than that other number. Of course, most of the time it is quite obvious which of two numbers is larger, and we don't need to plot them on a number line to find that out.
How can you find absolute value?
For real numbers, the absolute value of a positive number or zero is itself. The absolute value of a negative number is the same number with the minus changed to a plus.For example,| 37.2 | = 37.2| 0 | = 0| -17.234 | = 17.234
What is the sum of 27 and a number n?
To find the sum of the numbers, we must first know the value of n. This was not included in your question.
How do you find mean value of numbers?
add them all together and divide them by the number of numbers you have
What does a mode of a number mean?
You can't find the mode of a single number...but you can find the mode of a group of numbers The mode is the value with the highest frequency...that is, the value which appears the most often
How do you find absolute value of positive and negative numbers?
To find the absolute value of a positive number all the answer is is the number in between the lines. For example, the absolute value of [340] is 340. To find the absolute value of a negative number, it is simply the opposite (positive version) of the negative number. For example, the absolute value of [-56] is just 56.
How do you find the mid value in statistics?
The middle or mid value is easy to find....it is what it sounds like. If you have a group of numbers, you identify the largest and smallest, and then calculate the halfway point (largest # - smallest #). Then, from your group of numbers, identify the number closest to the number you came up with. If you are seeking a mid value from only two numbers, just subtract the smaller from the larger number and that's your answer.
How do you do mean medium mode and range?
To find mean: add all the numbers and divide by the amount of numbers. To find medium: put the numbers in order and find the middle value. If there are two, add them and divide by two. To find mode: find the number that appears most often. To find range: subtract the lowest number from the highest number.
How do you find a median if there is 8 numbers?
List the numbers in numerical order. You are looking for the middle number. In this case it will be the number halfway between the 4th and 5th number. Add the 4th and 5th numbers and divide them by 2, or find the number exactly halfway between the 4th and 5th numbers. So if your 4th number was 12 and your 5th number was 16, then the value halfway between them or the number that is half of the value when you add the two together is 14. That is the median.
How does a number line help you find the smaller value of two numbers?
Since the numbers on a number line increase from left to right, it follows that any number to the left of another number is smaller than that other number. Of course, most of the time it is quite obvious which of two numbers is larger, and we don't need to plot them on a number line to find that out.
What is the middle number called?
more ... The "middle" of a sorted list of numbers. To find the Median, place the numbers in value order and find the middle number. Example: find the Median of {13, 23, 11, 16, 15, 10, 26}. The middle number is 15, so the median is 15. (When there are two middle numbers we average them.)
How can you find absolute value?
For real numbers, the absolute value of a positive number or zero is itself. The absolute value of a negative number is the same number with the minus changed to a plus.For example,| 37.2 | = 37.2| 0 | = 0| -17.234 | = 17.234
Calculate the median?
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Where can someone find cell phone numbers listed online?
Someone can find cell phone numbers listed online on sites such as Facebook. People will only list their number online if they want to be called by friends. Mostly, cell phones numbers are not included in directories.
