MHB Probability of cancer because of microwaves

AI Thread Summary
The discussion revolves around calculating the probability of a person developing cancer due to microwave exposure. Given a population of 100,000, with 15% using microwaves, 1,500 individuals are estimated to develop cancer from microwave exposure, while 3,000 total cases of cancer occur in the population. This leads to the conclusion that 50% of cancer cases could be attributed to microwave use. The calculations highlight the relationship between exposure and cancer incidence, although the accuracy of the initial figures is questioned. Ultimately, the discussion emphasizes the need for clarity in understanding cancer risk factors related to microwave usage.
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Please help understand how to solve this question. Sorry for the terrible English.

If there’s 10% chance of getting cancer from microwaves, and 3% of the population gets cancer, what is the probability that a certain person who have cancer and was exposed to microwaves got it as a result from his exposure, if 15% of the population are exposed to microwaves.
 
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Imagine a population of 100000 people. "15% of people use microwaves": 15000 people use microwaves. "
If there’s 10% chance of getting cancer from microwaves" then 10% of 15000= 1500 of those people get cancer from microwaves. "
3% of the population gets cancer". That is 3% of 100000= 3000 people who get cancer.

Of the 3000 people who get cancer, 1500, 50% or them, get it from microwaves.

(I don't believe any of these numbers, by the way.)

(Your English is excellent. Much better than my [insert whatever language you like here. Maybe even English!)])

 
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