Box and whisker plot question.

This question has a picture of the box and whisker plots so I will just try to explain it. The question is comparing two box and whisker plots which shows the height of boys and girls.
The data for girls was:
Minimum - 64 inches
Lower quartile - 66 inches
Median - 67 inches
Upper quartile - 69 inches
Maximum - 70 inches
The data for boys was:
Minimum - 61 inches
Lower quartile - 65 inches
Median - 66 inches
Upper quartile - 70 inches
Maximum - 73 inches.
The question asks 'How many boys were taller than all of the girls?'. I know this is 25%, but how can I find how many that it is if I don't know how many boys were measured?

Can you take a photo of the question and upload it please?

Is that the whole question? Is there nothing before the words 'Given the ...'

Yes, that's the whole question.

You can only give a % then ...

Is there no way to calculate the number of boys surveyed given the data?

No, where does this question come from?

OK, I thought the same but the wording of the question seemed like it wanted a number. Thanks for your help.

OK, I thought the same but the wording of the question seemed like it wanted a number. Thanks for your help.