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| # | Name | Tags | Difficulty | Solved by | |
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| ✓ | rb_ch04_q037 | Two children one is girl probability two girls Red Book (Heard on the Street) · Ch 4 · Statistics Questions | x0 | ||
| ✓ | rb_ch04_q038 | Two children door girl appears probability two girls Red Book (Heard on the Street) · Ch 4 · Statistics Questions | x0 |