Pulse rates per minute of a patient observed by the doctor are 72, 78, 90, 102 and 73. Then the average pulse rate is

In a cricket match an over contains six balls. In a T-20 Cricket match it was already 5 balls bowled in the last over. If Sachin hits six for the last ball the mean becomes 4 runs per ball in the over. But Sachin hits four runs. Then the mean score per ball in that over is

The mid value of the class 10 – 19 is

For the given scores $\bar{X}=12\backslash overline\; X\; =\; 12$ and $\sum x_i=192\backslash sum\; x\_i\; =\; 192$, then n =

The mode of the scores 12, 11, 12, 9, 10, 9, 12 is

If the mean height of 3 boys is 142 cm. and the mean height of another 7 students is 145 cm., then the mean height of 10 students.

The median of rational numbers $\frac{1}{2},\frac{2}{3},\frac{5}{6},\frac{1}{4}\backslash frac\{1\}\{2\},\; \backslash frac\{2\}\{3\},\; \backslash frac\{5\}\{6\},\; \backslash frac\{1\}\{4\}$ and $\frac{3}{5}\backslash frac\{3\}\{5\}$

Mean of $2.8,\frac{5}{2},5.2,\frac{2}{5}2.8,\backslash frac\{5\}\{2\}\; ,\; 5.2\; ,\; \backslash frac\{2\}\{5\}$ is ……..

In the formula, $\bar{X}=\frac{\sum x_1}{n}\backslash overline\; X\; =\; \backslash frac\{\backslash sum\; x\_1\}\{n\}$ the letter  $\bar{X}\backslash overline\; X$ represents

A data is represented using the classes 20 – 29, 30 – 39, ………….., 120 – 129. What is the length of the class interval 90 – 99 ?