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1. In a survey of 80 students, 15 were taking 5 units, 28 were taking 4 units, 22 were taking 3 units, 8 were taking

1. In a survey of 80 students, 15 were taking 5 units, 28 were taking 4 units, 22 were taking 3 units, 8 were taking 2 units, and the rest were taking 1 unit class. (a) Complete the probability distribution below: Number of units Probability of Number of X units P (x) 2 W 4 5 (b) Find expected value for the number of units. (c) Find the probability of taking at least 4 units

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