Frank averages 3 strikes for every 10 frames that he bowls. if he bowled 42 strikes in a season, how many frames did frank bowl? a. 126 frames b. 140 frames c. 156 frames d. 164 frames

For this case we can make the following rule of three:
 3 strikes ---------> 10 frames
 42 strikes -------> x
 From here, we clear the value of x.
 We have then:
 
 
 frank did bowl about:
 B. 140 frames