Respuesta :
Answer: B. 0.1250
Step-by-step explanation:
Given: A computer is used to pick four letters, one after the other, from {P,Q}.
From the given possible outcomes for this experiment, the number of outcomes having all P or all Q (favorable outcomes)= 2
Total number of outcomes = 16
Now, the probability of picking four letters such that they are all P or all Q is given by :-
[tex]\text{P( all P or all Q)}=\frac{\text{favorable outcomes}}{\text{total outcomes}}\\\\=\frac{2}{16}=0.1250[/tex]