The table below shows the number of lakes in California classified by alkalinity and depth.
Depth classShallowModerateDeepTotalLow37236691829AlkalinityMedium4505121111,073classHigh8252551231,203Total1,6471,1333253,105
If a lake has medium alkalinity, which of the following is closest to the probability that the lake also has a moderate or deep depth?
We are looking for the following:
medium alkalinity lakemoderate or deep lake
Depth classShallowModerateDeepTotalLow37236691829AlkalinityMedium4505121111,073classHigh8252551231,203Total1,6471,1333253,105
Out of the 1,073 lakes, 512 and 111 are moderate or deep.
medium alkalinity lakemoderate or deep lake
1,073512+111
≈0.58