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Help !!!!!!!!!!!!!!!

Help !!!!!!!!!!!!!!!-example-1
User Jawira
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Hi!
I got 5.64… as the mean so D would be the answer.
What I did:
2 + ( 3*6) + (4*20) + (5*7) + 6 = 141
Take 141 and divide by 25
User Korywka
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