5.甲、乙两班共有学生84人,如果两班各转走2人,则两班人数的比是11:9,原来乙班有( )人.
A. | 36 | B. | 38 | C. | 46 |
4.花篮里红花与黄花数量的比是5:4,则黄花比红花少( )
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A. | $\frac{1}{5}$ | B. | $\frac{1}{4}$ | C. | $\frac{1}{9}$ |