If 15-6/3b =10, then b=

b = 2/5 = 0.4

Step-by-step explanation:

We know that:

We want to find the value of b, then we need to isolate b in one side of the equation.

First, let's subtract 15 in both sides of the equation so we get:

Now we can multiply both sides by 3*b, so we get:

Now we can divide both sides by -15:

Then:

b = 6/15 = 2/5

b = 2/5 = 0.4

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0