Lauren wants to wear something warm when she leaves for class. She reaches into her coat closet without looking and grabs a hanger. Based on what she has in her coat closet, she has a 30 chance of picking a sweater, a 50 chance of picking a coat, and a 20 chance of picking a jacket. What is the probability that she will pick a sweater or a coat?
a. 15
b. 30
c. 50
d. 80
Question 2
Students who live in the dorms at a college get free T.V. service in their rooms, but only receive 6 stations. On a certain evening, a student wants to watch T.V. and the six stations are broadcasting separate shows on baseball, football, basketball, local news, national news, and international news. The student is too tired to check which channels the shows are playing on, so the student picks a channel at random. On a different night, two students who don't know each other each choose a channel this way. The two events, N = the first student watches a news broadcast and F = the second student watches football are
a. independent events.
b. disjoint (mutually exclusive) events.
c. each simple events.
d. None of the above.
(a) Masai from East Africa have body types adapted to warm climates.
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