A socioligist surveyed the households in a small town. The random variable x represents the number of dependent children in the households. Determine the probability distribution's missing probability value.
«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»x«/mi»«/math» | «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»0«/mn»«/math» | «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»1«/mn»«/math» | «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»2«/mn»«/math» | «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»3«/mn»«/math» | «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»4«/mn»«/math» |
«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»P«/mi»«mfenced»«mi»x«/mi»«/mfenced»«/math» |
#a | #b | #c | «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mo»?«/mo»«/math» | #d |