A nursing student is planning his schedule for next quarter. He needs to take three courses, and one must be Statistics. For his other courses, he can choose one of two science classes and one of three social sciences classes. What is the probability that his social sciences class is not Economics?

Math Science
Social

Science

Statistics
Anatomy

Biology

Psychology

Economics

Sociology

2/3

Step-by-step explanation:

See attchment for table of subjects

P(one of science)=0.5

P(one of social sciences) = 1/3

P(not economics)= P(statistics and anatomy and psychology) + P(statistics and anatomy and sociology) + P(statistics and biology and psychology) + P(statisitcs and biology and sociology)

P(not economics) = 1×0.5×1/3 +  1×0.5×1/3 +  1×0.5×1/3 + 1×0.5×1/3

                           =2/3

step-by-step explanation:

cats