Bob can paint a fence in 5 hours, and working with jen, the two of them painted a fence in 2 hours. how long would it have taken jen to paint the fence alone?

Step-by-step explanation:

Given

Bob can Paint a fence in 5 hr

so full job can be done in 5 hr

in 1 hr job is done

suppose Jen done the work in x hr

so in 1 hr part of job is done

Also if they combine they can do the job in 2 hr

so in 1 hr

so

the expected value of the random variable : 0, 1 and 2

step-by-step explanation: