of 30 applicants for a job , 9 had at least 4 years ' experience , 18 had degrees , and 3 had less than 4 years ' experience and did not have a degree . how many of the applicants had at least 4 years ' experience and a degree ?
"b . 10 30 - 3 = 27 27 - 9 - 18 = - 10 then 5 are in the intersection between 4 years experience and degree . answer b"
add(subtract(add(9, 18), subtract(30, 3)), subtract(18, 9))