a. Rs. 20

b. Rs. 30

c. Rs. 40

d. Rs. 50

**Answer:** a. Rs. 20

a. 92%

b. 93%

c. 96%

d. 97%

**Answer:** c. 96%

a. Rs. 600, Rs. 900

b. Rs. 700, Rs. 900

c. Rs. 800, Rs. 600

d. Rs. 900, Rs. 600

**Answer:** d. Rs. 900, Rs. 600

a. 78%

b. 88%

c. 98%

d. Cannot be determined

**Answer:** d. Cannot be determined