It depends. If the order is important, (2 girls then 2 boys): There's a 1/2 chance of any sex, so the probability is 1/16(or 6.25%). But if it's just any order of 2 girls and 2 boys, then it's a different outcome. Consider the following table. The desired outcome is 2 girls, 2 boys in any order. We can just look for 2 girls, and convert to Boolean values of 1 for girl and 0 for boy. Here is the table:
0 0 0 0: 0
0 0 0 1: 1
0 0 1 0: 1
0 0 1 1: 2*
0 1 0 0: 1
0 1 0 1: 2*
0 1 1 0: 2*
0 1 1 1: 3
1 0 0 0: 1
1 0 0 1: 2*
1 0 1 0: 2*
1 0 1 1: 3
1 1 0 0: 2*
1 1 0 1: 3
1 1 1 0: 3
1 1 1 1: 4
Note each row has five numbers. The first four numbers represent the four children, and the fifth number is a sum of these four numbers. Any time the sum equals exactly 2, then the desired outcome (2 out of the four children are girls).
This happens 6 times out of the 16 total possible outcomes, so the probability is 6/16, or 3/8 = 37.5%
50%
Assuming boys are equally as likely as girls, 125 boys would be expected. The probability of getting 140 or fewer boys is approximately 97.51%
50/50
Assuming that boys and girls are equally likely, it is 11/16.
The answer depends on whether the children are picked at random. If they were selected from inside a girls' school the probability should be quite close to 0. Likewise, if the children were picked inside a boys' school. If six children are picked at random from a large group of children with an equal number of boys and girls, then the answer is 6C2*(1/2)6 = 15/32 = 0.47, approx.
50%
Assuming boys are equally as likely as girls, 125 boys would be expected. The probability of getting 140 or fewer boys is approximately 97.51%
50/50
Assuming that boys and girls are equally likely, it is 11/16.
Assuming that having boys and girls are equally likely, then the probability is 1/8. * * * * * You also need to assume that the children's genders are independent. They are NOT and depend on the parents' ages and genes.
Probability
The answer depends on whether the children are picked at random. If they were selected from inside a girls' school the probability should be quite close to 0. Likewise, if the children were picked inside a boys' school. If six children are picked at random from a large group of children with an equal number of boys and girls, then the answer is 6C2*(1/2)6 = 15/32 = 0.47, approx.
1/35
In a family with four children, the probability of having four boys is 1 in 16.
I wouldn't say it's very probable. My neighbor has three children and they're all boys. It just depends on the mother and father.
well it Will be even
0.48