成绩等级 | A | B | C | D |
人数 | 60 | x | y | 10 |
占抽查学生总数的百分比 | 30% | 50% | 15% | m |
根据表中的信息,解决下列问题:
(1)本次抽查的学生共有 ▲ 名;
(2)表中x、y和m所表示的数分别为x= ▲ ,y= ▲ ,m= ▲ ;
(3)补全条形统计图.
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2