a woman has 7 children ,and exactly half of them are boys.how is it possible?

来源:学生作业帮助网 编辑:作业帮 时间:2024/10/23 05:08:17
x1N@E%HdlYkg#] "A@EPZ4\ƛ[濙93bT$8AYi3q1"@-La𕚁Ba[I*@ GmEta8+\ƴγT4bQ 6Ǿ }mؽ:|ft黋{u_$K&·j?