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4) Fund managers fall into one of three categories: Stars, who outperform the market 60% of the time Average who outperform the market 40% of

4) Fund managers fall into one of three categories:

  • Stars, who outperform the market 60% of the time
  • Average who outperform the market 40% of the time (50% of all fund
  • managers are average).
  • Poor who outperform the market 30% of the time
  • Performance in each period is independent of performance in prior periods.
  • A manager, Sansa, has outperformed the market three periods in a row. You have just been told that based on this performance, and given the proportion of fund managers who are stars, that the probability that Sansa is a star fund manager is 25%.

What proportion of fund managers are stars?

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