When an apparently healthy person is diagnosed as unhealthy by a psychiatrist, the reason could be that:

Q.

When an apparently healthy person is diagnosed as unhealthy, the reason could be that:

Q. By examining the chest $X-$ray, the probability that $TB$ is detected when a person is actually suffering from it is $0.99$. The probability of an healthy person diagnosed to have $TB$ is $0.001$. In a certain city, $1$ in $1000$ people suffers from $TB$. A person is selected at random and is diagnosed to have $TB$. What is the probability that he/she actually has $TB$?

Q. The most apparent feature of an aged person,a healthy youth or a tender infant is:

Q.

The most apparent feature of an aged person,a healthy youth or a tender infant is___.

Q.

The most apparent feature of an aged person, a healthy youth or a tender infant is ___ of the skin.