Q10 of 49 Page 1

Two dice are thrown simultaneously. Find the probability of getting a doublet.

Number of possibilities of throwing two dice = 36

E (Getting a doublet) = {(1,1), (2,2), (3,3), (4,4), (5,5), (6,6)} = 6

P (E) =

The sum of first m terms of an AP is 4m² – m. If its n^th term is 107, find the value of n. Also find the 21th term of this A.P.

Calculate the common difference of the A.P.

For what value of k, are the roots of the quadratic equation y² + k² = 2 (k + 1) y equal?

The 9^th term of an A.P. is equal to 6 times its second term. If its 5^th term is 22, find the A.P.