1)- The marketing director for a small manufacturer of personal computers (PCs) believes that the discrete probability distribution shown in the following table characterizes the number, ý, of new PDs the firm will lease next year Leased Personal Computers y 7 8 9 10 11 12 13 p(y) 0.10 0.10 0.15 0.20 0.20 0.15 0.10 1. Is this a valid probability distribution? 2. What is the probability that exactly 9 PCs will be leased? 3. What is the probability that fewer than 12 PCs will be leased? 4. Determine the mean of the probability distribution. 5. Determine the variance of the probability distribution. 6. The manufacturer leases new PCs at a cost of $15,000 per year. Find the mean and variance of the total amount the company will earn next year from leasing PCs.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
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