RBI OFFICER GRADE ‘B’ PHASE-I EXAM Held on : 03.08.2014(Part-III)

Total Questions: 50

11. From a container of milk, 5 litres of milk is replaced with 5 litres of water. This process is repeated again. Thus in two attempts the ratio of milk and water became 81 : 19. The initial amount of milk in the container was

Correct Answer: (1) 50 litres
Solution:

12. A bag A contains 4 green and 6 red balls. Another bag B contains 3 green and 4 red balls. If one ball is drawn from each bag, find the probability that both are green.

Correct Answer: (2) 1/4
Solution:

Total balls in bag A

13. The sum of the radius and height of a cylinder is 42 cm. Its total surface area is 3696 cm². What is the volume of cylinder?

Correct Answer: (3) 17244 cubic cm
Solution:

Total surface area of cylinder

14. Study the pie-charts given below carefully and answer the questions.

Percentagewise Distribution of laptops (Dell & Lenovo) sold by six stores A, B, C, D, E and F in March 2014.

Total Number of Laptops (Dell & Lenovo) sold = 48000

Number of Dell Laptops sold = 28000
Percentage of Dell Laptops sold

The number of laptops of both types sold by stores A and C is more than that sold by stores E and F by

Correct Answer: (4) 2400
Solution:

Total laptops sold by stores
A and C = (18 + 15)% of 48000

15. Study the pie-charts given below carefully and answer the questions.

Percentagewise Distribution of laptops (Dell & Lenovo) sold by six stores A, B, C, D, E and F in March 2014.

Total Number of Laptops (Dell & Lenovo) sold = 48000

Number of Dell Laptops sold = 28000
Percentage of Dell Laptops sold

What is the ratio between the number of Dell and Lenovo laptops sold by store A?

Correct Answer: (1) 49 : 59
Solution:

Laptops of both kinds sold

16. Study the pie-charts given below carefully and answer the questions.

Percentagewise Distribution of laptops (Dell & Lenovo) sold by six stores A, B, C, D, E and F in March 2014.

Total Number of Laptops (Dell & Lenovo) sold = 48000

Number of Dell Laptops sold = 28000
Percentage of Dell Laptops sold

What is the respective ratio between the average number of Dell laptops sold by stores A, C and E and that sold by stores B, D and F?

Correct Answer: (3) 9 : 16
Solution:Required ratio = (14 + 12 +
10) : (32 + 8 + 24)
= 36 : 64 = 9 : 16

17. Study the pie-charts given below carefully and answer the questions.

Percentagewise Distribution of laptops (Dell & Lenovo) sold by six stores A, B, C, D, E and F in March 2014.

Total Number of Laptops (Dell & Lenovo) sold = 48000

Number of Dell Laptops sold = 28000
Percentage of Dell Laptops sold

By what per cent is the number of Lenovo laptops sold by store B is more than that of Dell laptops sold by store E?

Correct Answer: (2) 60%
Solution:

Total laptops sold by store B

18. Study the pie-charts given below carefully and answer the questions.

Percentagewise Distribution of laptops (Dell & Lenovo) sold by six stores A, B, C, D, E and F in March 2014.

Total Number of Laptops (Dell & Lenovo) sold = 48000

Number of Dell Laptops sold = 28000
Percentage of Dell Laptops sold

 What will be the central angle corresponding to number of laptops of both kinds sold by stores C and F?

Correct Answer: (1) 126°
Solution:Stores C and F 15 + 20 = 35%

19. Study the following table carefully and answer the questions that follow:

Description of Literate and Illiterate population of six villages

VillagesPercentage of Literate populationMale : FemaleRatio of Literate Males & Females
A48%7:513:7
B60%8:73:5
C72%4:53:4
D60%5:46:5
E50%7:314:11
F64%5:37:5

The number of literate women in village B is 39760 and that of illiterate women in village C is 25600. By what per cent is the population of village B less than that of village C?

Correct Answer: (1) 11.25%
Solution:

Literate men in Village B

20. Study the following table carefully and answer the questions that follow:

Description of Literate and Illiterate population of six villages

VillagesPercentage of Literate populationMale : FemaleRatio of Literate Males & Females
A48%7:513:7
B60%8:73:5
C72%4:53:4
D60%5:46:5
E50%7:314:11
F64%5:37:5

If the population of village F is 168000, what is the number of literate males?

Correct Answer: (1) 67200
Solution:

Literate population in village F