approximately 3.5 percent of all children born in a certain region are from multiple births (that is, twins, triplets, etc.). of the children born in the region who are from multiple births, 22 percent are left-handed. of the children born in the region who are from single births, 11 percent are left-handed. a random sample of 20 children born in the region will be selected. what is the probability that the sample will have at least 3 children who are left-handed? 0.598