There are 10 counters in a bag: 3 are red, 2 are blue and 5 are green.The contents of the bag are shaken before Maxine randomly chooses one counter from the bag. What is the probability that she doesn't pick a red counter?

Question

( A ) $\large\frac{3}{7}$
( B ) $\large\frac{7}{10}$
( C ) $\large\frac{2}{5}$
( D ) $\large\frac{3}{10}$