21. Find the value of n for which Gl- 2C O n - 6 None of the given options On = 4 On = 5 22. Find the standard deviation of the sample of measurements: 3, 4, 2. 5. 8, 4. 2. 1. 7. 23. A shipment of 10 spare parts, including 3 that are defective, is sent to an assembly plant. The quality control division selects 2 at random for testing and rejects the entire shipment if 1 or more in the sample are found to be defective. What is the probability that the shipment will be rejected? Sh Eト O O O O

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