Pre Assessment Test

The average marks of 23 students in an examination was 65. It was later found that the marks of one student had been wrongly entered as 48 instead of 94. The correct average is:

• 67

• 63

• 66

• 64

A trader marks the products 25% above the cost price and allows a discount of 30%. If the cost price is Rs. 2600 then the selling price is:

• 2100

• 2210

• 2470

• 2275

A simple interest of Rs. 4500 is earned by investing a sum of money for 18 years. The interest rate is 3% for the first 4 years, 6% for the next 6 years, and 7% beyond 10 years. Find the sum of money invested.

• 4326.9

• 5000

• 4400

• 4212.4

The difference between compound interest and simple interest on a certain sum for 2 years at 10 % is Rs. 25. The sum is

• 1500

• 1250

• 2500

• 1200

A bag contains 50 P, 25 P and 10 P coins in the ratio 8: 12: 5, amounting to Rs. 300. Find the number of coins of each type respectively.

• 320, 480, 200

• 160, 360, 200

• 200, 320, 480

• 200, 160, 300

P, Q and R started a business by investing Rs. 12000, Rs. 15000 and Rs. 18000 respectively. After 5 months, P invested Rs. 3000 more and after 3 more months, R withdraws Rs. 3000. Find the share of Q, if the total profit at the end of the year is Rs. 73200?

• 24900

• 24000

• 22500

• 30000

A father is four times as old as his son. Fifteen years ago, the father was ten times the son's age. What is the present age of the father?

• 50 years

• 80 years

• 100 years

• 90 years

There are three taps A, B and C in a water tank. By opening only tap A, the tank fills in 4 hours, on opening only tap B, the tank fills in 6 hours and opening only tap C, the tank empties in 3 hours. On opening taps A, B and C simultaneously, how much time will it take to fill the tank?

• 8 hours

• 10 hours

• 12 hours

• 18 hours

A, B and C can complete the work in 32 days, 24 days and 30 days respectively. If they started the work together, B left 12 days before completion of the work and C left 6 days before completion of the work and A finished the work. In how many days is the work completed?

• 10

• 15

• 12

• 16

A train crosses a pole in 12 seconds and the same train crosses a man running in the opposite direction at the speed of x km/hr in 8 seconds. Find the speed of the man, if the speed of the train is 30 m/sec.

• 30 kmph

• 24 kmph

• 15 kmph

• 54kmph