120 students in a fifth grade class are surveyed about what kinds of pets they have. Of the 120 students, 30 have a goldfish, 40 have a mouse, and 10 have a goldfish and a mouse. Using this information, answer each of the following questions. Are these 2 events mutually exclusive ?

What makes a personal exceptionality/non-exceptionality

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

What was the role of european colonies during the industrial revolution