Find the mean of the distribution:

In a group of 50 scouts in a camp, 30 are well trained in first aid techniques while the remaining are well trained in hospitality but not in first aid. Two scouts are selected at random from the group. Find the probability distribution of number of selected scouts who are well trained in first aid. Find the mean of the distribution also. Write one more value which is expected from a well trained scout.

In a group of 30 scientists working on an experiments 20 never commit error in their work and are reporting results elaborately. Two scientists are selected at random from the group. Find the probability distribution of the number of selected scientists who never commit error in the work and reporting. Also, find the mean of the distribution. What values are described in the question?

Find the missing frequencies for the following distribution if the mean of the distribution is 34.

Find the frequencies in the following frequency distribution if it is known that the mean of the distribution is 1.46.

Find the missing frequency in the following distribution, if it is known that the mean of the distribution is 50.16

Two numbers are selected at random (without replacement) from first 7 natural numbers. If X denotes the smaller of the two numbers obtained, find the probability distribution of X. Also, find mean of the distribution.

For a certain distribution, mode and median were found to be 1000 and 1250 respectively. Find mean for this distribution using an empirical relation

Find mode of the following frequency distribution. The mean of above distribution is 53. Empirical formula to find approximate value of median.

Find the mean of the students for the following distribution:

Find the mean of the students for the following distribution