The oldest child in a family of four children is twice as old as the yougest. The two middle children are 13 and 16 years old. If the average age of the children is 13.25 , how old is the youngest child? Your answer is :

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next