Answer:
The mean would increase from 76 to 79
Explanation:
50 +74+ 76+ 77 +78 +79 +80 +81 +82+ 84 = 761
761 ÷ 10 = 76
74+ 76+ 77 +78 +79 +80 +81 +82+ 84 = 711
711 ÷ 9 = 79
I hope this helps
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