mr jones has one hot air balloon with a samll basket. 6 children want to go. he has them right down their names on a small piece of paper and he picks one at ramdom. 1.what is the probability he will select a boy? 2.What is the probability he will select a girl?

Question

anonymous · Answer

.5 probability of either assuming there are three girls and three boys.

anonymous · Answer

So if there were two boys it would be 2/6 or 1/3/ Because one out of every three of the children are boys.

anonymous · Answer

i dont get it
:]

anonymous · Answer

You have to know how many of the 6 kids are boys and how many are girls.  For example, if all 6 were girls, then he'd be guaranteed to choose a girl!

anonymous · Answer

Not enough information about the individual number of boys and girls.  No solution.

anonymous · Answer

If you don't know the numbers of boys and girls, you would have to generalize.

P(b) = b / (b + g)

Table of values for all possibilities:

Boys  Girls  P(b)
0        6       0
1        5       1/6
2        4       2/6 or 1/3
3        3       3/6 or 1/2
4        2       4/6 or 2/3
5        1       5/6
6        0       6/6 or 1

anonymous · Answer

Well, I guess if you know there are 6 children, you could just say,

P(b) = b/6

:-)