On rainy weekend days, the probability that Karen bakes bread is 90%. On the weekend, the probability of rain is 50%. There is a 29%
chance that today is a weekend day. What is the probability that today
is a rainy weekend day in which Karen is baking bread?

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  13%

Step-by-step explanation:

The probability is the product of the individual probabilities.

  p(baking | rainy weekend) = 0.90

  p(rainy weekend) = p(rain | weekend) × p(weekend) = 0.50×0.29 = 0.145

Then ...

  p(baking) = p(baking | rainy weekend) × p(rainy weekend) =

  0.90 × 0.145 = 0.1305 ≈ 13%