we know that
The number estimate of Australia's population with type O blood in \(2010\) is \(49\%\) of the total estimate
So
to find the best estimate of the number of australians with type O blood in \(2010\)
Multiply the total Australia's population estimate by the percentage with type O blood
\(21,515,754*0.49=10,542,719.46\)
therefore
the answer is
the best estimate of the number of australians with type O blood in \(2010\) is the option
D)10,542,719
