The following graphs have no scales assigned to them Which o

The following graphs have no scales assigned to them. Which of them could be density curves for a continuous random variables if they were the right scale?

Solution

The probability that a random variable falls into a specific region of space of possibilities is given by the integral of the density of this variable between either limit of this region.
The probability density function is non-negative throughout its domain and its integral over all space is unit value.

Therefore the answers is A) D) and E)