The following data is obtained from the survey. Compute Harmonic Mean.

$\begin{array}{|cccccc|}\hline \text{ Speed of the car }& 130& 135& 140& 145& 150\\ \text{ Number of cars }& 3& 4& 5& 8& 3\\ \hline\end{array}$

 

Find the geometric mean of the values $10, 5, 14, 8, 15$.

Calculate the Geometric mean from the following data : 

$3, 13, 11, 15, 5, 4, 2$.

Find the geometric mean for the following data, which gives the defective screws obtained in a factory.

$\begin{array}{|ccccc|}\hline \text{ Diameter }\left(\mathrm{cm}\right)& 5& 15& 25& 35\\ \begin{array}{c}\text{ Number of defective }\\ \text{ screws }\end{array}& 5& 8& 3& 4\\ \hline\end{array}$

The geometric mean of the series $1,2,4,......,2^n$ is,

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Geometric Mean is better than other means when?

Calculate the geometric and the harmonic mean of the following series of monthly expenditure of a batch of students.

$125,130,75,10,45,0.5,0.40,500,150,5$