Tolong yaaa pake caraa pleaaeeee

Rata - rata = jml seluruh data/banyak data
●Jmlh data =
laki : 20 × 6 = 120
Perempuan : 30 × 8 = 240
Jmlh seluruh = 120 + 240 = 360

●banyak data = 20 + 30 = 50

●rata2 = 360/50 = 7,2 C

Maaf klo caranya kurang jelas :)