Concept explainers
The students at a university are classified by a 0 for freshman, a 1 for sophomores, a 2 for juniors, a 3 for seniors, and a 4 for graduate students. There are two extra scholarships to assign, so an administrator randomly selects from a box with only the numbers 0, 1, 2, 3, and 4 to choose the class of the first recipient. She then puts the number back into the box and randomly selects a number for the class of the second recipient. Find the
(a) An odd number is chosen first and an even number is chosen second. (Note: 0 is considered an even number.)
(b) The sum of the two numbers selected is greater than 4.
(c) For both selections, an even number is drawn.
(d) The sum of the two numbers selected is odd.
(e) The same number is drawn twice.
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