Extension Management And Community Development - Study Mode
[#146] In observation method participant observers, can collect material from a group to a large extent if helshe acts
Correct Answer
(C) objectively
[#147] Match the following. List-I List-II a. 2D 1. Field visit b. 3D 2. Poster c. Projected aid 3. Models d. Non-projected aid 4. Films 5. Bulletin boards
Correct Answer
(B) a-2, b-3, c-1, d-4
[#148] Which of the following are correct facts related to adult education programmes? 1. The actual inauguration of the Technology education programmes took place in 1978. 2. Adult education is a form of informal education. 3. Include inspection or testing in the learning process of adults.
Correct Answer
(C) 1, 2 and 3
[#149] The population census will have the primary data from
Correct Answer
(A) registrar general and census commissioner
[#150] The arithmetic mean of the direct 100 natural numbers is
Correct Answer
(D) 50.5
Explanation
Solution: Understanding the Question: This question asks you to find the average (arithmetic mean) of the first 100 natural numbers. Natural numbers are the counting numbers: 1, 2, 3, and so on. Finding the Arithmetic Mean: The arithmetic mean is calculated by adding all the numbers together and then dividing by the total number of numbers. In this case, we need to add up the numbers from 1 to 100, and then divide by 100. A Simple Trick: There's a shortcut! To find the sum of numbers from 1 to 100, you can use the formula: (n * (n + 1)) / 2 , where 'n' is the last number (100 in this case). Let's calculate: 1. Substitute n = 100 into the formula: (100 * (100 + 1)) / 2 = (100 * 101) / 2 = 5050 2. Divide the sum (5050) by the total number of numbers (100): 5050 / 100 = 50.5 Therefore, the arithmetic mean of the first 100 natural numbers is 50.5. The correct answer is D: 50.5