For what value of n, the nth term of A.P. 63, 65, 67, ….. and nth term of A.P. 3, 10, 17, …… are equal ?

Three coins are tossed once. Find the probability of getting :

(i) 3 heads

(ii) exactly two heads

(iii) atleast 2 heads.

In the given figure, PQ is a chord of a circle with center O and PT is the tangent at point P. If angle QPT = 60°, then find angle PRQ where R is a point on the circle.

The following table shows a record of the weights, in kilogram, of 100 pupil. Find the mean weight.