-8=5b-3b plz help asap plz

Multiply. write your answer in simplest form. 3/8 x 5/7

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.

A. 120 degrees b. 90 degrees c. 30 degrees d. 60 degrees