Question

In any given year, a factory has a 20% probability of having an accident. About every how many years might the factory expect to have an accident?


Every 1 year


Every 2 years


Every 5 years


Every 20 years

Answer 1

Answer:

Probability of having an accident = 20% o 0.2

Thus,

Expected number of years = 1/probability of accident = 1/0.2 = 5

Hence,

3.    Every 5 years  is the correct option.

Step-by-step explanation:

Answer 2

The factory will expect to have an accident every 5 years.

The probability of having an accident in the factory = 20% = 20/100 = 0.2

It should be noted that the highest likelihood for an event happening is 100% which is represented by 1.

Therefore, the number of years that the factory expect to have an accident will be:

= 1 / probability of having an accident

= 1/0.2

= 5 years

In conclusion, the factory will expect an accident every 5th year.

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