The following table gives the values of mean and variance of heights and weights of the 10th standard students of a school.

	Height	Weight
Mean	155 cm	46.50 kg
Variance	72.25 cm2	28.09 kg

Which is more varying than the other?

The standard deviation and mean of a data are 6.5 and 12.5 respectively. Find the coefficient of variation.

If n = 5 , \(\bar { x } \) = 6, Σx² = 765 then calculate the coefficient of variation.

Two coins are tossed together. What is the probability of getting different faces on the coins?

A die is rolled and a coin is tossed simultaneously. Find the probability that the die shows an odd number and the coin shows a head.

Write the sample space for tossing three coins using tree diagram.

Write the sample space for selecting two balls from a bag containing 6 balls numbered 1 to 6 (using tree diagram).

If A is an event of a random experiment such that P(A) : P(\(\bar { A } \)) = 17.15 and n(S) = 640 then find (i) P(\(\bar { A } \)) (ii) n(A).

A and B are two events such that, P(A) = 0.42, P(B) = 0.48, P(A ∩ B) = 0.16. Find (i) P(not A) (ii) P(not B) (iii) P(A or B)

Find the range and coefficient of range of the following data.
43.5, 13.6, 18.9, 38.4, 61.4, 29.8