10 students-girls & boys are in a line

[Cylab]

10 students--girls & boys are in a line...

Hello

There are 10 students--girls and boys--in a line.
What is probability of p-th student is girl.
{p=1,...10}

Thanks for your attention in advance.

 

[HallsofIvy]

There is no way to answer that without further information. If there are five boys and five girls, the probability that anyone student, in any position in line, is a girl is 1/2, of course. But if the 10 students consist of seven boys and three girls,it is 3/10. The position doesn't matter. If x of the 10 students are girls, then the probability that any specific place in line is filled by a girl is x/10.