用字典统计Tom Marry和q的语文，数学，英语成绩，并计算Tom和Marry的语文，数学，英语总分，并显示总人数，统计Tom Marry和q的语文，数学，英语的平均分

scores = {
'Tom': {'语文': 90, '数学': 80, '英语': 85},
'Marry': {'语文': 95, '数学': 75, '英语': 90},
'q': {'语文': 85, '数学': 90, '英语': 80}
}

# 统计Tom和Marry的语文，数学，英语总分
Tom_total = sum(scores['Tom'].values())
Marry_total = sum(scores['Marry'].values())

# 显示总人数
total_students = len(scores)

# 统计Tom Marry和q的语文，数学，英语的平均分
Chinese_avg = (scores['Tom']['语文'] + scores['Marry']['语文'] + scores['q']['语文']) / total_students
Math_avg = (scores['Tom']['数学'] + scores['Marry']['数学'] + scores['q']['数学']) / total_students
English_avg = (scores['Tom']['英语'] + scores['Marry']['英语'] + scores['q']['英语']) / total_students

print('Tom的总分为：', Tom_total)
print('Marry的总分为：', Marry_total)
print('总人数为：', total_students)
print('语文的平均分为：', Chinese_avg)
print('数学的平均分为：', Math_avg)
print('英语的平均分为：', English_avg)