Question

if the mean of 17,19,23,16 a,18 and14is17.find the value of ,​

Answer 1

We know that the formula to find the mean is given by :-

\text{Mean}=\dfrac{\text{Sum of observations}}{\text{Number of obserbvations}}Mean=

Number of obserbvations

Sum of observations

Given : The mean of 17, 19, 23, 16, a, 18 and 14 is 17.

i.e. Mean = 17

Sum of numbers = 17+19+23+16+a+18+14=107+a

Total numbers =7

Put values in formula , we get

\begin{gathered}17=\dfrac{107+a}{7}\\\\ 7\times17=107+a\\\\ 119=107+a\\\\ a=119-107=12\end{gathered}

17=

7

107+a

7×17=107+a

119=107+a

a=119−107=12

Hence, the value of a is 12.

# Learn more :

Mean of 8 numbers is 38.4 and the mean of seven of them is 39.2 what is the eight number

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Answer 2

value of a = 09

hope you understand