Prior Probabilities for Economic Boom, Moderate Growth, and Recession in the Land

Multiple Choice

Prior probabilities for economic boom, moderate growth, and recession in the Land of the Bipeds are given below. There is a Land of Mortals where there are only two states: Boost or Roast. Conditional probability of Boost or Roast, given various states of economic conditions in the Land of the bipeds, is also known and presented below.

The $\mathrm{P}($ Boost $)$ is

A) 0.16
B) 0.15
C) 0.46
D) 0.54