When Dianne turns 30, Alex will be 30 x 2 = <<30*2=60>>60 years old.
Allison will be 30/2 = <<30/2=15>>15 years old then.
Dianne will turn 30 in 30 - 16 = <<30-16=14>>14 years.
Currently, the age of Alex is 60 - 14 = <<60-14=46>>46.
Currently, Allison is 15 - 14 = <<15-14=1>>1 year old.
So, the sum of Alex and Allison's ages now is 46 + 1 = <<46+1=47>>47 years old.
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