How is it that he claims average work experience to be 6 to 10 years but average age to be 40? Someone who is 40 should have 15+ years of work experience shoul

How is it that he claims average work experience to be 6 to 10 years but average age to be 40? Someone who is 40 should have 15+ years of work experience shouldn't they? 6 to 10 implies an age of late 20's Early 30's