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clc
//initialisation
a1=2
a2=6
a3=16
a4=2
b1=1
b2=3
b3=4
b4=7
//CALCULATIONS
a=a1+a2+a3+a4
x=a1*b1+a2*b2+a3*b3+a4*b4
p2=a1/a
p6=a2/a
p16=a3/a
d=x/a
//results
printf(' \n probability of state 2= % 1f ',p2)
printf(' \n probability of state 6= % 1f ',p6)
printf(' \n probability of state 16= % 1f ',p16)
printf(' \n value of <x>= % 1f ',d)