100 | 88 | 95 | 54 | 89 | 78 | 85 | 77 |
99 | 96 | 76 | 87 | 90 | 69 | 92 | 84 |
94 | 78 | 79 | 64 | 75 | 85 | 97 | 100 |
58 | 66 | 75 | 86 | 88 | 89 | 95 | 93 |
69 | 65 | 78 | 87 | 100 | 97 | 86 | 96 |
(1)完成下表.
分数/分 | 100 | 90~ |
99 | 80~ | |
89 | 70~ | |
79 | 60~ | |
69 | 60 | |
以下 | 合计 | |
人数/人 |
(2)如果把满分定为特等奖、90~99分定为一等奖、80~89定为二等奖,那么获得这三类奖的各有多少人?获奖率是多少?
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