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vredina [299]
4 years ago
11

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
Mathematics
2 answers:
Sholpan [36]4 years ago
6 0

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.

puteri [66]4 years ago
4 0
.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. 
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