A car dealer records the number of Mercedes sold each week. During the past 50 weeks, there were 15 weeks with no sales, 20 weeks with one sale, 10 weeks with two sales, and 5 weeks with three sales. Let X be the number of Mercedes sold in a week selected at random from the past 50 weeks. Compute E(X). Enter just a real number rounded off to one decimal place (no label).
Fill in the blank(s) with the appropriate word(s).
1.1
| (a) |
| (b) | E(X) = 1.1; The dealer can expect to sell an average of 1.1 cars per week. |
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