Total marbles are 16
No. of blue marbles are 4
The probability of finding blue marble is
[tex]\frac{4}{16}=\frac{1}{4}[/tex]Thus the probability that the marble is not blue is
[tex]P(\text{not blue)=}1-\frac{1}{4}=\frac{3}{4}[/tex]The answer is 3/4
