provide the answer plz..
Dear Student
Combined Mean = (20)(30) + (25)(40) / 30+40 = 600 + 1000 / 70
Combined Mean = 1600 / 70
Combined Mean = 22.85
Regards
Combined Mean = (20)(30) + (25)(40) / 30+40 = 600 + 1000 / 70
Combined Mean = 1600 / 70
Combined Mean = 22.85
Regards