Welcome to the CDS 1 2024 Maths Lecture on Average and Percentage Multiple Choice Questions (MCQs). Today, we’ll dive into these fundamental concepts and tackle various MCQs to strengthen our understanding. Whether you’re gearing up for an exam or simply brushing up on your math skills, this lecture will help you master averages and percentages.

CDS 1 2024 Average and Percentage MCQs Maths Lecture

Understanding Averages:

Let’s start with averages. The average, or mean, is a central measure of a set of numbers. It’s calculated by adding up all the numbers in the set and then dividing by the total count of numbers. Averages help us understand the typical value in a dataset and are widely used in various real-life scenarios, from calculating exam scores to analyzing sports statistics.

Percentage Basics:

Next, let’s talk about percentages. Percentages represent a portion of a whole, with 100% representing the entire quantity. They’re often used to express proportions, rates, and changes. Understanding percentages is essential for interpreting data, comparing values, and solving various mathematical problems.

Q) Two classes X and Y have students 32 and 30. Average of X is 45 and Y is 50. Find the average of both the class.

A. 54.32

B. 47.42

C. 61.23

D. 40.25

Ans : B

Q) The average of 11 results is 50. If the average of first six result is 49 and that of last six results is 52, find the sixth result.

A. 2

B. 64

C. 56

D. 65

Ans : C

Q) In a mixture of milk and water the proportion of water by weight was 75%. If in the 60 g of this mixture 15 g water was added, what would be the percentage of water ?

A. 75%

B. 80%

C. 90%

D. 100%

Ans : B

Q) A reduction of 20% in the price of sugar enables Mr. Bhadra to buy an extra 5 kg of it for ₹ 320. The original rate of sugar is  

A. ₹ 12 per kg

B. ₹ 15 per kg

C. ₹ 16 per kg

D. ₹ 20 per kg

Ans : C

Q) In a library 5 per cent books are in English; 10 per cent of the remaining are in Hindi and 15 per cent of the remaining are in Sanskrit. The remaining 11628 books are in French. Then, find the total number of books in the library.

A.15000

B.12000

C.16000

D.10000

Ans : C

For an explanation of the above questions and other related MCQs, please refer to the YouTube video above.