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(Solved): Please help me solve this problem Suppose the number of mec...

Please help me solve this problem
Suppose the number of mechanical failures occurring in an industrial plant follows a Poisson distribution with an average of 1.4 failures per week.
(a) What is the probability of no mechanical failures in a given week?
(b) What is the probability that four or more mechanical failures will occur during a three-week period?
Thanks

(Solved): Given the word Decimal how many arrangement wiil the word...

Given the word Decimal
how many arrangement wiil the word start with a vowel and end with a consonet if repeat is not allowed?

(Solved): A brand of television has a lifetime that is normally distr...

A brand of television has a lifetime that is normally distributed with a mean of 7 years and a standard deviation of 2.5 years. What is the probability that a randomly chosen TV will last more than 8 years? Note: Write your answers with two places after the decimal, rounding off as appropriate.

(Solved): 55 club members arrived at a recent meeting:one member was ...

55 club members arrived at a recent meeting:
one member was selected randomly.
what is:I p(he took a taxi)?
II P(he walked)?
III P(he did not take the bus)?

(Solved): Psychologists estimate that 80% of male drivers, when lost ...

Psychologists estimate that 80% of male drivers, when lost in trying to find
a location, continue to drive rather than asking for directions. If this
estimate is correct, what is the probability that, in a random sample of 100
lost male drivers, the proportion who continue to drive is
a. at least 0.70?
b. less than 0.85?
I just want which formula I should use . please tell me step by step not shortcut method . great thanks

(Solved): Given 12 students, 5 of which are females, if 2 students ar...

Given 12 students, 5 of which are females, if 2 students are selected at random, without replacement, what is the probability that both students are female.

(Solved): A student is preparing for an upcoming midterm exam. The pr...

A student is preparing for an upcoming midterm exam. The professor given the student 40 practice questions and plans to select 12 of the questions at random to create the midterm exam. Suppose the student knows how to correctly answer 34 of the 40 questions. Let X represent the number of questions the student answers correctly on the exam.
What is the probability distribution of X?

(Solved): 8. A bag contains fourteen yellow balls, two violet balls, ...

8. A bag contains fourteen yellow balls, two violet balls, and nine red balls. You pick one without looking. What is the probability that you will draw three red balls in a row?

(Solved): The average credit card debt for college seniors is $4250. ...

The average credit card debt for college seniors is $4250. If the debt is normally distributed with a standard deviation of $1200, find the probability that a senior owes less than $5000.

(Solved): 1. A construction company wants to submit a bid for remodel...

1. A construction company wants to submit a bid for remodeling a school. The research and planning needed to make the bid cost $4000. If the bid were accepted, the company would make $26,000. Would you advise the company to spend the $4000 if the bid has only 20% probability of being accepted? Explain your reasoning.