Exercises_on_Probability (1)

# Exercises_on_Probability (1) - Exercises on Probability#1...

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February 17, 2010 Exercises on Probability #1. The psychology department has 20 male rats (15 white and 5 spotted) and 30 female rats (15 white and 15 spotted). A) What is the probability of randomly selecting a female? B) What is the probability of randomly selecting a white male? C) Which selection is more likely, a spotted male or a spotted female? #2. A jar contains 10 red marbles and 30 blue marbles. A) If you randomly pick 1 marble from the jar, what is the probability of obtaining a red marble? B) If you take a random sample of 3 marbles (with replacement) from the jar and the first 2 marbles are both blue, what is the probability that the third marble will be red? #3. A) A large basket of fruit contains 3 oranges, 2 apples and 5 bananas. If a piece of fruit is chosen at random, what is the probability of getting an orange or a banana? B) A pair of dice is rolled. What is the probability of getting a sum of 2? C) In a class of 30 students, there are 17 girls and 13 boys.

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## This note was uploaded on 04/29/2010 for the course PSYCH 315 taught by Professor Afroditipanagopoulos during the Winter '10 term at Concordia Canada.

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Exercises_on_Probability (1) - Exercises on Probability#1...

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