Correct Answers: | |

Wrong Answers: | |

Unattempted: |

### Question 1

The average age of three friends 3 years ago was 31 years. The average age of two them 5 years ago was 19 years. What is the present age of the third friend?

**A**

54 years.

**B**

55 years.

**C**

53 years.

**D**

52 years.

**Soln.**

**Ans: a**

Let the present ages of the three friends be a, b and c. We are given ${(b - 5) + (c - 5)}/2$ = 19. Which gives b + c = 48. We are also given ${(a - 3) + (b - 3) + (c - 3)}/3$ = 31, which gives a + b + c = 3 * 31 + 9 = 102. Putting b + c here we get a = 102 - (b + c) = 102 - 48 = 54 years.

### Question 2

The average weight of the 12 bogies of a train increases by 9 Kg when a new bogie replaces a bogie of weight 12 Kg. What is the weight of the new bogie.

### Question 3

What is the average of first 263 natural numbers?

### Question 4

Each of the 4 bulbs of a batch has a life 81 years. If a new bulb with a life 44 years more than the average of all 5 bulbs is added, what is the sum total of the values of all 5 bulbs?

**A**

460 years.

**B**

461 years.

**C**

459 years.

**D**

458 years.

**Soln.**

**Ans: a**

Let the average of all 5 bulbs be x, then the required total is T = 5x. By averages, $x = {4 × 81 + (x + 44)}/5$ which is same as $x × 5 = {4 × 81 + (x + 44)}$, which is same as $T = {4 × 81 + (T/5 + 44)}$, solving for T we get 460 years.

### Question 5

The sales(in rupees) of a karyana store for five consecutive days is 1770, 1086, 2220, 3774, 2154. What should be the sale on the sixth day so that the overall average sale is 1966?

### More Chapters | See All...

Areas | Ratio and Proportion | Essential Part | Clocks and Calendars | Decimal Numbers | Averages | Boats and Streams | abba Series | Partnerships | Deductive Reasoning | More...

This Blog Post/Article "Averages Quiz Set 013" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Updated on 2019-08-18.