2 years ago

Find the probability of a couple having at least one boy when a couple has three children

Mathematics

2 answers:

elixir [45]2 years ago

8 0

Answer:

7/8

Step-by-step explanation:

assuming the probability of getting a boy and girl is 50 50,

(1/2)^3=1/8

1-1/8=7/8

gulaghasi [49]2 years ago

7 0

If you have one child you either have a boy or girl can you tell me the chance of having a boy
I am asking this to have an understanding of what you know

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denis23 [38]

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Step-by-step explanation: can someone please answer this.

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3 years ago

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A soccer player uses her head to hit a ball up in the air from a height of 2 meters with an initial vertical velocity of 5 meter

ozzi

Answer:

The ball will hit the ground in 1.33 s if no one touches it. The equation has 2 real solutions.

Step-by-step explanation:

The ball will hit the ground when its height is equal to 0 meters, therefore using this value in the expression and solving for "t" will give us the correct solutions.

$h = -4.9*t^2 + 5*t + 2\\\\-4.9*t^2 + 5*t + 2 = 0\\\\t_{1,2} = \frac{-5 \pm \sqrt{5^2 - 4*(-4.9)*(2)}}{2*(-4.9)}\\\\t_{1,2} = \frac{-5 \pm \sqrt{64.2}}{-9.8}\\\\t_{1,2} =\frac{-5 \pm 8.0125}{-9.8}\\\\t_1 = \frac{-5 - 8.0125}{-9.8} = 1.33 \text{ s}\\\\t_2 = \frac{-5 + 8.0125}{-9.8} = -0.3 \text{ s}$