Question

The average of 100 measurements is 23 and the average of 50 additional measurements is 27.

Which quantity is larger?
A. the average of 150 measurements
B. 25

Answer 1

Total value of 100 measurements
100 * 23
2300

Total value of additional 50 measurements
50 * 27
1350

Total value of 150 measurements
2300 + 1350
3650

Average of 150 measurements
3650 / 150
24.3

25 > 24.3

Answer is B