Watch this short video (00:49) to see how to to create an audience based on age and gender in Google Analytics.
Create the Audience
In Admin, under Data display, click Audiences.
Click New audience.
Under Suggested Audiences, go to Templates and select Demographics.

Next to Age, go to + Add filter.
Select the age groups you want and click Apply.

Next to Gender, go to + Add filter.
Under Condition, change the selector to is one of.

Select the gender you want and click Apply.

Replace Untitled audience with your audience name and click Save. (In this example, the title could be “Male and 18-24”).

Your new audience appears at the top of the management table.

Source: Google Support
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