Topic: Probability using Permutations and Combinations A Math class consists of 14 girls and 15 boys. The teacher likes to have the students come to the board to demonstrate how to solve some of the Math problems. During a lesson, the teacher randomly selects 6 of the students to show their work. What is the probability that all 6 of the students selected are girls?

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A: Mean(µ) = 55.5 Standard deviations (σ) = 3.1 X ~ N (µ, σ )= N ( 55.5, 3.1)

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A:   Hence, the 95% confidence interval is (2.356,18.644) .  

Q: A license plate consists of two letters and three digits. How many different plates can be made if r...

A: no.of digits (0 to 9)=10no.of letters (A to Z)=26

Q: Example 4.2. Suppose the joint distribution of X and Y is given by 1 P(X = x, Y = y) 42 (z + y°) [1,...

A: Solution

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Q: percent of those that play FIFA also play DOTA?

A: Here use Bayes rule

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A: The given probabilities are p(0)=0.10, p(1)=0.30, p(2)=0.20, p(3)=0.15 and p(4)=0.25.

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Q: what is the probability that one or more of the selected companies are located in the said global co...

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Q: Consider a husband and wife with brown eyes who have 0.75 probability of having children with brown ...

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A: Find E(y) and V(y)   

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Q: 4. Z= 2.35 5. Z=-1.23

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A: Farmula used  nCr=n!/(r!(n-r)!) r!=r(r-1)(r-2)...3x2x1   

Q: What is the probability of picking an orange marble and flipping tails?

A: Given  Total ball=7 

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A: state whether the function is a probability mass function or not. if not explain why not.p={(7,-0.3)...

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Q: the GPA within 0.21 at the 99% confidence level? The population standard deviation is 1.35. If neede...

A: Given  Population standard deviations=σ=1.35,   Level of significance=ɑ=0.01, margin of error=moe=0....