Probability Questions and answers. Binominal distribution,Normal distribution,Poisson distribution

"IMPORTANCE OF BINOMIAL DISTRIBUTION 
IMPORTANCE OF NORMAL DISTRIBUTION

Question:
The weekly wages of 1000 workers are listed as normal with mean 80 and SD 5. Estimate the number of workers whose wages will be,

  1. Between rs 80 and rs 82.
  2. More than rs 82.
  3. Less than rs 60.
  4. More than rs 90

Answer:
Question:
Suppose that the number of accidents over a month is distributed as Poisson distribution with λ=5. Calculate probability of,
1. 3 accidents.
2. Less than 3 accidents

Answer:"

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