Question 1189853
z=0 with probability (5/11)(4/10)=2/11.
z=1 with probability (5/11)(6/10)+(6/11)(5/10)=60/110 or 6=2/11
z=2 with probability (6/11)(5/10=3/11
The sum of the three probabilities is 1.
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there are 2^3=8 elements in the sample space
DDD; x=3
DDN; x=2
DND; x=2
DNN; x=1
NDD;x=2
NDN;x=1
NND;x=1
NNN;=x=0