Math Arguments
Problems, Questions, and Puzzles to spark discussion and argument in the maths classroom.
Reasoning With Frequency Trees
Rh+ or Rh- .... A, B, AB (both), 0 (Neither)
Yes, that should read zero, indicating that there's no A or B in the blood, but of course someone misread that all those years ago and it is now blood type O.
Create the frequency tree diagram to get the percentages below. AB- is more like 0.6%, BTW. You might have to fudge some of the numbers a bit.
.
More Information:
++