if the mean of 6,4,8,p and 12 is 15 then the value of p is
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CBSE
Mathematics
Grade 8
Mean

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If the mean of 6, 4, 7, p and 10 is 8, find
Hint: To solve this question, we will use the formula of calculating the mean of some numbers of the data given. The mean of n numbers is given by
Mean=Sum of all n numbersn.Mean=Sum of all n numbersn.
Therefore, we will use this formula to calculate the value of p.
Complete step by step answer:
Let us first define the mean. Mean is also called the Arithmetic Mean n the average of the numbers also called a central value of a set of numbers. To calculate mean,
1. Add up all the numbers
2. Then divide by how many numbers there are.
Example: Calculate the mean of the first 5 natural numbers. The first five natural numbers are 1, 2, 3, 4, 5.
Mean=Sum of first 5 natural numbers5Mean=Sum of first 5 natural numbers5
⇒Mean=1+2+3+4+55⇒Mean=1+2+3+4+55
⇒Mean=