In a group of 1200 people, 468 have brown eyes, 252 have blue eyes, 132 have green eyes, and 348 have black eyes. what is the probability that a person chosen at random from this group has blue eyes?

Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different