20 people apply for a job, 12 have school certificates and 10 have diplomas. if 2 have no qualifications how many have both a school certificate and a diploma?

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

want or the answer