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makkiz [27]
3 years ago
5

Most people think babies are equally likely to come as either a boy or a girl. This is not true. Actually, about 51.3% of all ba

bies are boys. If a family has two children (not twins), what is the chance they have one boy and one girl
Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
4 0

Answer:

0.499662

Step-by-step explanation:

Now since 51.3% of all babies are boys, this means that the probability of having a baby boy P(b) = 51.3/100 = 0.513

Since there are only two options, you are either a boy or a girl. The Probability of having a girl child P(g) = 1 - P (b) = 1 - 0.513 = 0.487

Now, we proceed to calculate the probability.

The probability of having one boy and one girl = probability of one boy and one girl or probability of one girl and one boy

Or in probability means that we have to add the two possibilities together.

P = (0.513*0.487) + (0.487 * 0.513) = 0.499662

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Ksju [112]

Answer:

The correct answer is D. 10.

Step-by-step explanation:

If Brandy earns 2 stars for every goal, and she scored 8 goals, then we need to multiply 8 by 2.

8 x 2 = 16

She looses 1/2 a star for every miss, and she missed the goal 12 times. Therefore, we need to multiply 1/2 by 12.

12 x 1/2 = 6

Therefore, Brandy lost 6 stars.

Now, we need to subtract the amount of stars Brandy earned by the amount that she lost.

16 - 6 = 10

Therefore, the correct answer is D. 10.

Hope this helps! :D

5 0
3 years ago
The area of a circle is 78.5 cm² . Find the lenght of the radius of a circle . Use π = 3.14
Tpy6a [65]

Answer:

5cm  = r

Step-by-step explanation:

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A = pi r^2

78.5 = 3.14 r^2

Divide each side by 3.14

78.5/ 3.14 = r^2

25 = r^2

Take the square root of each side

sqrt(25) = sqrt(r^2)

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6 0
3 years ago
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Speed of the plane with no wind = 440 mph
5 0
3 years ago
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Answer:

Step-by-step explanation:

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8 0
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