Answer:
24
Explanation:
2|5 means 25, so
1|2 = 12
1|3 = 13
1|5 = 15
2|8 = 28
3|0 = 30
4|2 = 42
there are 7 numbers, so mean = (sum)/count = (sum) /7
= (12+13+15+28+28+30+42) / 7 = 24 for our answer
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