Find the mean of first six multiples of 4.

Classify the following events as certain to happen, impossible to happen, may or may not happen:

A. Getting a number less than 1 on throwing a die.

B. Getting head when a coin is tossed.

C. A team winning the match.

D. Christmas will be on 25 December.

E. Today moon will not revolve around the earth.

F. A ball thrown up in the air will fall down after some time.

A die was thrown 15 times and the outcomes recorded were

5, 3, 4, 1, 2, 6, 4, 2, 2, 3, 1, 5, 6, 1, 2

Find the mean, median and mode of the data.

Find the median of first nine even natural numbers.

The mean of three numbers is 10. The mean of other four numbers is 12. Find the mean of all the numbers.