The average of 30 numbers is 36 If Z is subtracted from each of these 30 numbers then the average be...........

Quantitative Aptitude (MTS) Average

The average of 30 numbers is 36. If Z is subtracted from each of these 30 numbers, then the average becomes 28. What is the

value of Z?

This questions was previously asked in

SSC MTS 20th July 2022 Shift-3

- The average of 30 original numbers is 36, so the total sum of these numbers is 30 * 36 = 1080.

- If Z is subtracted from each of these numbers, their average becomes 28.

- The sum of the numbers now becomes 30 * 28 = 840.

- The difference between the original sum and the new sum is the total amount subtracted, which is 1080 - 840 = 240.

- Since Z is subtracted from each of the 30 numbers, we have 30 * Z = 240.

- Solving for Z gives Z = 240 / 30 = 8.

- Correct Answer: Option 2: 8

Submit Error