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Morgarella [4.7K]
3 years ago
9

If the teacher picks a group of 3 at random, what is the probability that everyone in the group is a girl?

Mathematics
2 answers:
SIZIF [17.4K]3 years ago
6 0
Since there are six boys and 4 girls there would be a 33.33333333333333333333333333333333333333333333333 etc.
ser-zykov [4K]3 years ago
3 0
Picking everyone is a dependent variable so
4/6*3/6*2/6=
=2/3*1/2*1/3
=2/18
=1/9
the probability is 1/9
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We are given the end points ( -3,-1 ) and ( -8,9 ) of a line and a point P = ( -6,m ) divides this line in a particular ratio.

Let us assume that it cuts the line in k : 1 ratio.

Then, the co-ordinates of P = ( \frac{-8k-3}{k+1},\frac{9k-1}{k+1} ).

But, \frac{-8k-3}{k+1} = -6

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i.e. m = \frac{27-2}{3+2}

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