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lubasha [3.4K]
3 years ago
14

a family has five children. the probability of having a girl is 1/2. whats probability of having at leasr 4 girls g'

Mathematics
1 answer:
Dima020 [189]3 years ago
7 0

Answer:

Probability of having at least 4 Girls

= 0.6875

Step-by-step explanation:

Probability of having at least 4 Girls is 1-probability of having exactly 3 girls

Total number of children= 5 = N

Probability of having a girl p = 0.5

Probability of not having a girl q= 0.5

X= 3

Probability of at least 4 girls is given by

Probability= NCX(p)^x(q)^(N-x)

Probability = 5C3(0.5)^3(0.5)^(5-3)

Probability = 5C3(0.5)^3(0.5)^2

Probability= 5!/3!2!(0.5)^3(0.5)^2

Probability= 10(0.125)(0.25)

Probability= 0.3125

Probability of having at least 4 Girls

= 1- 0.3125

= 0.6875

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If for some reason this is incorrect, try 2 cups instead of 3. Both are reasonable measurements when it comes to baking.

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3 years ago
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Answer:

x=\frac{30}{7}

Step-by-step explanation:

We have been given an equation \frac{2}{3}x=-\frac{1}{2}x+5. We are asked to solve our given equation.

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\frac{2}{3}x+\frac{1}{2}x=-\frac{1}{2}x+\frac{1}{2}x+5

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Now, we will make a common denominator.

\frac{2*2}{3*2}x+\frac{1*3}{2*3}x=5

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Add numerators:

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\frac{6}{7}*\frac{7}{6}x=5*\frac{6}{7}

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Therefore, the solution for our given equation is x=\frac{30}{7}.

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3 years ago
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2.25 is correct have a good day
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