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 () out of 8 children, with each value of corresponding to the probability of getting exactly girls.
Part (a): Find the probability of getting exactly 6 girls in 8 births.
From the provided table:
Thus, the probability of getting exactly 6 girls in 8 births is:
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:
- What is the probability of getting at least 5 girls in 8 births?
- What is the probability of getting no more than 4 girls?
- How do you calculate the mean and standard deviation of a binomial distribution?
- If the probability of a girl birth is 0.5, how would the probabilities change for each ?
- How can cumulative probabilities be useful in interpreting this table?
Tip: In a binomial distribution, the sum of all individual probabilities 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