Rohit invested ₹ 9,600 on ₹ 100 shares at ₹ 20 premium paying 8% dividend. Rohit sold the shares when the price rose to ₹ 160. He invested the proceeds (excluding dividend) in 10% ₹ 50 shares at ₹ 40. Find the :

(i) original number of shares.

(ii) sale proceeds.

(iii) new number of shares.

(iv) change in the two dividends.

The given diagram represents two sets A and B on real number lines.

(i) Write down A and B in set-builder form.

(ii) Represent A ∪ B, A ∩ B, A' ∩ B, A - B and B - A on separate number lines.

Given 20 - 5x < 5(x + 8), find the smallest value of x when :

(i) x ∈ I

(ii) x ∈ W

(iii) x ∈ N