Step 1 :Define the parameters of the binomial distribution: the number of trials \(n = 20\) and the probability of success \(p = 1/12\).
Step 2 :Calculate the probability \(P(X=3)\) using the binomial probability formula: \(P(X=3) = \binom{n}{k} \cdot (p^k) \cdot ((1-p)^{n-k})\), where \(k = 3\). The result is approximately 0.150.
Step 3 :This number represents the probability that exactly 3 males in the group are color-blind.
Step 4 :Calculate the probability \(P(X \geq 2)\) by summing the binomial probabilities for \(k\) from 2 to \(n\). The result is approximately 0.505.
Step 5 :This number represents the probability that at least 2 males in the group are color-blind.
Step 6 :Calculate the probability \(P(3 \leq X \leq 6)\) by summing the binomial probabilities for \(k\) from 3 to 6. The result is approximately 0.229.
Step 7 :This number represents the probability that between 3 and 6 males in the group are color-blind.
Step 8 :Calculate the expected value \(\mu\) of the binomial distribution using the formula \(\mu = n \cdot p\). The result is approximately 1.667.
Step 9 :\(\mu\) represents the expected number of males who are color-blind in the group.
Step 10 :Calculate the probability \(P(X=\mu)\) using the binomial probability formula. Since \(\mu\) is not an integer, round it to the nearest integer before calculation. The result is approximately 0.319.
Step 11 :This number represents the probability that approximately 2 males of the ethnic origin in the group are color-blind.
Step 12 :Final Answer: a) \(P(X=3)=\boxed{0.150}\), which is the probability that 3 males are color-blind. b) \(P(X \geq 2)=\boxed{0.505}\), which is the probability that at least 2 males are color-blind. c) \(P(3 \leq X \leq 6)=\boxed{0.229}\), which is the probability that between 3 and 6 males are color-blind. d) \(\mu=\boxed{1.667}\), where \(\mu\) is the expected number of males who are color-blind. \(P(X=\mu)=\boxed{0.319}\), which is the probability that approximately 2 males of the ethnic origin are color-blind.