3. Today's local newspaper lists 20 stocks "of local interest." Of these stocks, ten increased, five decreased and five remained unchanged yesterday. If we decide to buy two of the stocks, what is the...

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Extracted text: 3. Today's local newspaper lists 20 stocks "of local interest." Of these stocks, ten increased, five decreased and five remained unchanged yesterday. If we decide to buy two of the stocks, what is the likelihood that both increased yesterday? 3. 4. Six employees of a marketing firm had effectiveness ratings as follows: 0.72, 0.46, 0.59, 0.64, 0.81 and 0.76. Find the probability of selecting an employee with the indicated effectiveness rating. a. Greater than 0.75. a. b. b. Less than 0.75 but greater than 0.5. c. Greater than the mean. с. d. Not less than 0.9. d. ||