Math Problem Statement

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Part 1

The accompanying table describes results from groups of 8 births from 8 different sets of parents. The random variable x represents the number of girls among 8 children. Complete parts​ (a) through​ (d) below.

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Part 1

a. Find the probability of getting exactly 6 girls in 8 births.

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​(Type an integer or a decimal. Do not​ round.)

Number of

Girls x

​P(x)

0

0.001

1

0.039

2

0.117

3

0.197

4

0.292

5

0.197

6

0.117

7

0.039

8

0.001

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Solution

The table provides the probability distribution for the number of girls (xx) out of 8 children, with each value of P(x)P(x) corresponding to the probability of getting exactly xx girls.

Part (a): Find the probability of getting exactly 6 girls in 8 births.

From the provided table:

  • x=6x = 6
  • P(6)=0.117P(6) = 0.117

Thus, the probability of getting exactly 6 girls in 8 births is:
P(6)=0.117P(6) = 0.117

So, the answer is:

0.117


Would you like me to walk through how these probabilities are calculated (using binomial distribution formulas)? Or do you have other questions related to this problem?

Here are 5 related questions:

  1. What is the probability of getting at least 5 girls in 8 births?
  2. What is the probability of getting no more than 4 girls?
  3. How do you calculate the mean and standard deviation of a binomial distribution?
  4. If the probability of a girl birth is 0.5, how would the probabilities change for each xx?
  5. How can cumulative probabilities be useful in interpreting this table?

Tip: In a binomial distribution, the sum of all individual probabilities P(x)P(x) should always equal 1.

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Math Problem Analysis

Mathematical Concepts

Probability
Binomial Distribution

Formulas

P(x) = C(n, x) * p^x * (1-p)^(n-x)
Binomial Probability Formula

Theorems

Binomial Theorem

Suitable Grade Level

Grades 10-12