Data Handling T...

The mean of 96, 104, 121, 134, 142, 149, 153 and 161 is 132.5
If true then enter $$1$$ and if false then enter $$0$$

If the mode of the following data $$10, 11, 12, 10, 15, 14, 15, 13, 12, x, 9, 7$$ is $$15$$, then the value of $$x$$ is:

The mean of five numbers is $$30$$. If one number is excluded, their mean becomes $$28$$. The excluded number is:

The mean of prime numbers between 20 and 30 is :

Let $$\bar{x}$$ be the mean of $$x_1, x_2 , ... , x_n$$ and $$\bar{y}$$ the mean of $$y_1, y_2, ... , y_n$$. If $$\bar{z}$$ is the mean of $$x_1, x_2, ... , x_n$$, $$y_1, y_2, ... , y_n$$, then $$\bar{z}$$ is equal to

There are $$50$$ numbers. Each number is subtracted from $$53$$ and the mean of the numbers so obtained is found to be $$3.5$$. The mean of the given numbers is:

In a diagnostic test in mathematics given to students, the following marks (out of $$100$$) are recorded:
$$46, 52, 48, 11, 41, 62, 54, 53, 96, 40, 98, 44$$
Which average will be a good representative of the above data?

Find the mean of the data $$10, 15, 17, 19, 20$$ and $$21$$.

Find the mean of the observations $$425, 430, 435, 440, 445, ........... 495.$$