Answered: Please help me with both questions.…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Please help me with both questions. These are just 2 and you are allowed to answer 3. Please help asap. Thank you!

Transcribed Image Text:25. A survey found that people keep their microwave ovens an average of 3.2 years. The standard deviation is 0.56 year. If a person decides to buy a new microwave oven, find the probability that he or she owned the old oven between 2 to 3 years. Assume the variable is normally distributed. 24.35% 31.24% 34.32% 21.24 26. The average number of milligrams (mg) of sodium in a certain brand of low-salt microwave frozen dinners is 660 mg, and the standard deviation is 35 mg. Assume the variable is normally distributed. If a single dinner is selected, find the probability that the sodium content will be more than 670 mg. 61.41% 38.59% 7.64 92.36%

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