Question: When a computer disk manufacturer tests a disk, it writes to the disk and then tests it using a certifier. The certifier counts the number

When a computer disk manufacturer tests a disk, it writes to the disk and then tests it using a certifier. The certifier counts the number of missing pulses or errors. The number of errors on a test area on a disk has a Poisson distribution with Lamda = 0.2. (i) What is the expected number of errors per test area? (ii) What percentage of test areas has two or fewer errors? (iii) What percentage of test areas has more than three errors?

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