What is the average number of girls admitted to College A over all six years?

Concept

The arithmetic mean of n observations is their total divided by n. For tabular data, first isolate the values for the requested category, then add them and divide by the number of observations.

Application

1. Read the College A girls values for 2018-2023: 720, 840, 1380, 1920, 2580, and 2880.

2. Add the six values: 720 + 840 + 1380 + 1920 + 2580 + 2880 = 10320.

3. There are 6 years, so the average is 10320 ÷ 6 = 1720.

Cross-check

Multiplying the computed average by the number of years gives 1720 × 6 = 10320, which reproduces the total.

Result

Therefore, the average number of girls admitted to College A is 1720.