When 15 is included in a list of natural numbers, their mean is increased by 2.

Sail E0 Webinar

Question

When 15 is included in a list of natural numbers, their mean is increased by 2. When 1 is included in this new list, the mean of the numbers in the new list is decreased by 1. How many numbers were there in the original list?

Options:

A . 4

B . 5

C . 6

D . 8

Answer: Option A

Submit Your Solution Below and Earn Points !

Next Question

Submit Solution

More Questions on This Topic :

Question 1. The average temperature of the town in the first four days of month was 58 degrees. The average for the second, third, f....8, then what is the temperature on the fifth day?

Question 2. The average marks in Science subject of a class of 20 students is 68. If the marks of two students were misread as 48 an....72 and 61 respectively, what would be the correct average?

Question 3. The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 1....six numbers is 11.4, then the middle number is :

Question 4. A pupil’s marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by....by half. The number of pupils in the class is-

Question 5. Average of ten positive numbers is $$\overline x $$. If each number is increased by 10%, then $$\overline x $$ -....

Question 6. A student obtained 60, 75 and 85 marks respectively in three monthly examinations in Physics and 95 marks in the final e....as a monthly examination. His average marks in physics are-

Question 7. The average age of all the students of a class is 18 years. The average age of boys of the class is 20 years and that of....20, then find the number of boys in the class.

Question 8. In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the rate in the remaining 40 overs to....remaining 40 overs to each the target of 282 runs?

Question 9. If the average of 5 numbers is 10, the number which should be added to make the average 12 is-....

Question 10. The batting average for 40 innings of a cricket player is 50 runs. His highest score exceeds his lowest score by 172 run....is 48 runs. The highest score of the player is

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

Chapter 3.1 : Overview of Finance & Accounts Department Chapter 3 : Finance & Accounts SAIL E0 - GFM 2024

Chapter 2.1 : Overview Chapter 2 : Materials Management SAIL E0 - GFM 2024

Chapter 1.1 : Personnel Functions- An overview Chapter 1 : Personnel Management SAIL E0 - GFM 2024

GPOE / GPA Combined 1 Free CBT Mock Test SAIL E0 2024

CBT Mixed Test 1 GPOE/GPA SAIL E0 2024