rata rata nilai tugas matematika khansa adalah... A. 8,3 B. 7,83 C. 7 D. 7,5

rata² = [(6+8)X3 + (7+9+10)x2]/(3+2+3+2+2)
= (42+52)/12
= 94/12
= 7,83

rata rata
=( 6(3) + 7(2) + 8(3) + 9(2) + 10(2) )/12
=( 18+14+24+18+20)/12
= 94/12
= 7,83

jawabannya B

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