Solution
For this case we have the following info given:
14 yr experience = 21 loans
HS education = 96 loans
14 yr experience or HS education = 111 loans
And we can use the following formula:
14yr OR HS = 14 yr + HS - (14 yr AND HS)
Solving we got:
14 yr and HS = 14 yr + HS - (14 yr OR HS)
14 yr and HS = 21 +96 -111 =6