5 out of 10 marbles are bule
If the first marble is blue and is not replaced, there are 9 marbles left with 4 blue marbles
And therefore, the probability will be:
[tex] \frac{5}{10} [/tex] × [tex] \frac{4}{9} [/tex]
=[tex] \frac{20}{90} [/tex]
It can be simplified further:
=[tex] \frac{2}{9} [/tex]
