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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

bobbym
2012-12-13 12:50:56

Hi JaneDyan;

Yes, that is another way of getting it.

JaneDyan
2012-12-13 12:47:45

Thank you very much! smile

Following the manner on how you solve the problem, I realized that the first question could also be answered by
getting the complement/not the probability of both wells producing oil:
       1-.02=0.98

bobbym
2012-12-13 12:10:49

Hi JaneDyan;

Welcome to the forum.

What is the probability that at most one well produces oil?

That can mean 0 or 1 so

.8 + .18 = .98

At least one?

That means 1 or 2 which is the complement of none.

1 - .8 = .2

JaneDyan
2012-12-13 11:17:27

Please help me with this problem:
An oil-prospecting firm plans to drill 2 exploratory wells. Past evidence shows that the probability that  neither well produces oil is 0.8; the probability that exactly one well produces oil is 0.18; and the probability that both wells produces is 0.02. What is the probability that at most one well produces oil? At least one?

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