Question

Ellen plans to have two children but doesn't know if they will be boy-boy, girl-girl, or boy-girl. What is the probability that she will have two girls?
0.25
0.5
0.75
1.00

Answer 1

Answer:

Option A. 0.25

Step-by-step explanation:

Ellen plans two children but does not know if they will be boy-boy, girl-girl or boy-girl.

For the first baby to be the girl child

Probability = $\frac{1}{2}$

Similarly probability for second baby to be the girl child will be $\frac{1}{2}$

Now both the children are girl to probability for this event will be

= $\frac{1}{2}$ × $\frac{1}{2}$

= $\frac{1}{4}$

= 0.25

Option A. 0.25 is the answer.

Answer 2

.25 because you would look at it like a boy-girl situation and this problem is more of a science problem. Anyways, if you do BG(BoyGirl) x BG(BoyGirl) it equals BB(Boy Boy), BG( Boy Girl ), another BG and a GG ( Girl Girl ) so there is a 1/4 chance of having 2 girls which is the same as .25.