Free brainlest for the queen queen size queen

Which expression is equivalent to the expression shown?

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

After reading 80% of her e-mails in her inbox, danette still has m unread e-mails. which of the following expressions could represent the number of e-mails danette had in her inbox before she started reading? choose 2 answers: (choice a) 5m (choice b) 1.8m (choice c) 80m (choice d) m/0.8 (choice e) m/1−0.8