Problem with Bayes Theorem exercise

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In a certain country, there are two types of job, good and bad, and two possible levels of educational attainment, high and low. Everyone in this country is a member of one of two ethnic groups, R and S. The probability of getting a good job if you have high education is 0.6; the probability of getting a good job if you have low education is 0.3. Among the R group the probability of getting high education is 0.2 and among the S group it is 0.5. How are the members of the R and S groups distributed across good and bad jobs? If two-thirds of the population belongs to the R group, what proportion of the population has a good job?