Mr. Das invests in ₹ 100, 12% shares of Company A available at ₹ 60 each. Mr. Singh invests in ₹ 50, 16% shares of Company B available at ₹ 40 each. Use this information to state which of the following statements is true.

1. The rate of return for Mr. Das is 12%

2. The rate of return for Mr. Singh is 10%

3. Both Mr. Das and Mr. Singh have the same rate of return of 10%

4. Both Mr. Das and Mr. Singh have the same rate of return of 20%

Amit invested a certain sum of money in ₹ 100 shares, paying a 7.5% dividend. The rate of return on his investment is 10%. The money invested by Amit to purchase 10 shares is :

1. ₹ 250

2. ₹ 750

3. ₹ 900

4. ₹ 1100

If -4x > 8y; then

1. x > 2y

2. x > -2y

3. x < -2y

4. x < 2y

The value/s of 'k' for which the quadratic equation 2x² - kx + k = 0 has equal roots is (are) :

1. 0 only

2. 4, 0

3. 8 only

4. 0, 8