Choose the One Alternative That Best Completes the Statement or Answers

Choose the one alternative that best completes the statement or answers the question.
-Suppose that the sample space is $\mathrm { S } = \{ 1,2,3,4,5,6,7,8,9,10 \}$ and that outcomes are equally likely. Compute the probability of the event $E = \{ 1,2,4,5,7,9,10 \}$ .

A) 7
B) $\frac { 7 } { 10 }$
C) $\frac { 7 } { 9 }$
D) $\frac { 4 } { 5 }$