There are 30 students in a class. If 10 students are boys, how many girls are there? A. 20 B. 10 C. 40 D. 50 相关知识点: 试题来源: 解析 A。本题考查减法运算。班级共有 30 名学生,其中 10 名是男生,那么女生的数量就是 30 - 10 = 20 名,所以选择 A。B 选项 10 是男生的数量。
There are 30 students in a class. 15 are boys. How many are girls? A. 10 B. 15 C. 20 D. 25 相关知识点: 试题来源: 解析 B。本题考查减法。班级里有 30 个学生,15 个是男生,那么女生的数量是 30 减 15 等于 15。A 选项 10 不对;C 选项 20 和 D 选项 25 都错误。
There are 30 students in a class. Two-thirds of them are boys. How many boys are there? A. 10 B. 20 C. 30 D. 40 相关知识点: 试题来源: 解析 B。三分之二的学生是男孩,30 的三分之二是 20。本题涉及到数学的分数计算和英语中的分数表达。
There are 30 students in a class. 15 students are boys. How many girls are there? A. 10 B. 15 C. 20 D. 25 相关知识点: 试题来源: 解析 B。班级里有 30 个学生,15 个是男生,那么女生数量是 30 - 15 = 15。A 选项 10 是错误的,30 - 20 = 10,与题目不符;C 选项 20 和 D 选项...
百度试题 结果1 题目There are 30 students in a class. 18 are girls. How many boys are there? A. 10 B. 12 C. 15 D. 18 相关知识点: 试题来源: 解析 B。总人数 30 减去女生 18 人,剩下 12 个男生。反馈 收藏
There are 30 students in a class. 1/3 of them are boys. How many girls are there? A. 20 B. 10 C. 15 D. 5 相关知识点: 试题来源: 解析 A。男生人数为 30 乘以 1/3 等于 10 人,女生人数为 30 - 10 = 20 人,所以选择 A。此题考查分数乘法和减法的综合运用,先算出男生人数,再用总...
There are 30 students in a class. If 2/5 of the students are boys, how many boys are there? A. 10 B. 12 C. 14 D. 16 相关知识点: 试题来源: 解析 B。本题考查分数的应用。30 的 2/5 是 30 乘以 2/5 等于 12。A 选项 10 错误;C 选项 14 错误;D 选项 16 错误。
There are 30 students in a class. The average score of a math test is 80. If the average score of 20 girls is 85, what is the average score of the boys? A. 70 B. 75 C. 80 D. 85 相关知识点: 试题来源: 解析 B。本题考查平均数的计算。总分 = 30×80 = 2400,女生总分 = 20...
Since three-fifths of the students are girls, two-fifths are boys. The number of boys in the class is 25×30=12. 一个班有30名学生,其中五分之三是女生.班里有多少男孩( ). A.6 B.12 C.18 D.24 由于五分之三的学生是女生.五分之二的学生是男生. 这个班男生的人数是25×30=12. 故选B...
In a class, there are 30 students. If 10 students are boys, the fraction of boys in the class is _. A. one - third B. one - thrid C. one over thirt D. one on third 相关知识点: 试题来源: 解析 A。解析:10占30的三分之一。分子one是基数词,分母third是序数词,分子是1,分母不...