The time taken by a postman deliver letters to a certain apartment block is normally distributed with mean 12 minutes and standard

Question

The time taken by a postman deliver letters to a certain apartment block is normally distributed with mean 12 minutes and standard deviation 2 minutes . Estimate the probability that he takes :-
1) longer than 17 minutes
2) less than 10 minutes
3) between 9 and 13 minutes

Ivy · Answer

Answer:   3) between 9and 13 hsihsink uvsisbsihs isjishsid ksizjsjz

Clara

(2) What fraction of 1 kg is 20g?

(a) 1/4
(b) 1/8
(c) 1/6
(d) 1/5
Answer the question as soon as fa

17. What is book cover design? Is it important for book cover, explain it.

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