Probability calculation by graph

Which of the following radial probability distribution graph is correct for 5s orbital ?

Consider the probability distribution of a random variable X Calculate (i) V( X/2) (ii) Variance of X.

If a is an integer and a in (-5,30] then the probability that the graph of the function y=x^(2)+2(a+4)x-5a+64 is strictly above the x-axis is

The probability that the graph of y=16x^(2)+8(a+5)x-7a-5=0, is strictly above the x-axis,If a in[-20,0]

By Baye's theorem, which one of the following probabilities is calculated ?

Graphs|Plots Of Radical Probability Function|Filling Of Orbitals In Atoms|Electrons Configuration Of Elements|OMR

If a in[-6,12], the probability that graph of y=-x^(2)+2(a+4)x-(3a+40) is strictly below x axis is