Two hundred students of Warren Junior High were surveyed on whether they prefer rock music or jazz music. The table below shows the relative frequencies.
| |
Rock |
Jazz |
Total |
| Boys |
|
|
0.60 |
| Girls |
|
0.22 |
|
| Total |
0.70 |
0.30 |
1 |
How many more boys than girls prefer rock music?