Answer:
Mean: 19
Median: 20
Mode: 20
Step-by-step explanation:
Arranged in increasing order:
10, 15, 15, 15, 20, 20, 20, 20, 25, 30
Mean
190/10 = 19
Median
20+20= 40
→ 40/2
→20
Mode
If all the data values have the same frequency, all the data values are modes. Here, the mode(s) is/are 20.