Answer:
Tuesdays
Explanation:
Given men : women ratios of 1:6 and 2:11 on Tuesdays and Thursdays, respectively, you want to know which day has the higher proportion of women.
Comparing ratios
Ratios are most easily compared of one of the numbers is the same in both ratios. Here, we can double the first ratio to make the number units representing men be 2:
1 : 6 = 2 : 12 . . . . . ratio on Tuesdays
2 : 11 . . . . . . . . . . . ratio on Thursdays
There are relatively more women on Tuesdays. (12 > 11)
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Additional comment
We can also make the number representing men be 1. Dividing the second ratio by 2 gives ...
2 : 11 = 1 : 5.5
Now, we can see that 5.5 is less than 6, so the proportion of women is higher on Tuesdays. These ratios (6, 5.5) are effectively "unit rates", or women per man.