A doctor says that a infant who predominantly turns the head to the

right will be right-handded and the one who turns the head to the left

will be left-handed. The newborn baby girl turned her head to the left.

Given that 90% of the population is right-handed, what is the probability

of baby being right handed if the test is 90% accurate ? What if it is

80% accurate ?

I got 0.5 for the first question and 0.6923 for the second, is this correct?