Which value is a solution of the equation 3-2x=-5?

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table

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