1. Childhood lead poisoning is a public health concern in the United States. In a certain population, three children in ten have a high blood lead level (defined as 30 grams/liter or more). If six children are randomly selected, calculate the probability that 2 of the 6 of the children have a high blood lead level. A. 0.2593 B. 0.3241 C. 0.0900 D. 0.0216 2. Childhood lead poisoning is a public health concern in the United States. In a certain population, three children in ten have a high blood lead level (defined as 30 grams/liter or more). If six children are randomly selected, calculate the probability that less than 2 of the 6 of the children have a high blood lead level. A. 0.7443 В. 0.3051 C. 0.3241 D. 0.4202 3. Childhood lead poisoning is a public health concern in the United States. In a certain population, three children in ten have a high blood lead level (defined as 30 grams/liter or more). If six children are randomly selected, calculate the average number of children in the sample of 6 that have a high blood lead level. А. 3.00 В. 1.80 С. 0.33 D. 4.20 4. Childhood lead poisoning is a public health concern in the United States. In a certain population, three children in ten have a high blood lead level (defined as 30 grams/liter or more). If six children are randomly selected, calculate the standard deviation for the number of children in the sample of 6 that have a high blood lead level. A. 2.00 В. 1.122 С. 1.260 D. 2.160