Thirty percent of the members of a swim club have passed the lifesaving test. Among the members who have not passed the test, 21 have taken the preparatory course and 42 have not taken the course. How many members are there in the swim club?	Choose the correct choice from the following choices:
A) 40  B) 60  C) 80  D) 90  E) 140
30% of the members have passed the test, thus 70% have not passed the test.   We also know that 42+21= 
<gadget id="calculator">42+21</gadget>
<output>63</output>
63 members have not passed the test, thus 0.7*Total=63 --&gt; Total=90.   Answer: 90.
<result>D</result>
Thirty percent of the members of a swim club have passed the lifesaving test. Among the members who have not passed the test, 21 have taken the preparatory course and 42 have not taken the course. How many members are there in the swim club?