Quantitative Aptitude

1. The average of 6 observations is 45.5. If one new observation is added to the previous observation, then the new average becomes 47. The new observation is:         (2)

1. 1. 58
2. 2. 56
3. 3. 50
4. 4. 46
5. 5. 48

2. The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average age is increased by 0.2 year. The average age of the new students is:        (2)

1. 1. 15.2 years
2. 2. 16 years
3. 3. 16.2 years
4. 4. 16.4 years
5. 5. 12 years

3. The mean weight of 120 student in the second year’s class of a college is 56 kg. If the mean weight of boys and that of the girls in the class are 60 kg and 50 kg respectively, then the number of boys and girls in the class are respectively:            (3)

1. 1. 72,64
2. 2. 38,64
3. 3. 72,48
4. 4. Can’t be determined
5. 5. None of these

4. A reduction of 20% in the price of rice enables a person to buy 3.5 kg more rice for Rs 385. The original price of rice is:           (4)

1. 1. Rs 20 per kg
2. 2. Rs 22.50 per kg
3. 3. Rs 25 per kg
4. 4. Rs 27.50 per kg
5. 5. Rs 29.50 per kg

5. 23.001 × 18.999 × 7.998 =?           (3)

1. 1. 4200
2. 2. 3000
3. 3. 3496
4. 4. 4000
5. 5. 2500