Ellen has a bag with 3 red marbles and 2 blue marbles in it. she is going to randomly draw a marble from the bag 300 times, putting the marble back in the bag after each draw. what is the best prediction for the number of times that ellen will draw a blue marble?

In 300 draws Ellen should expect to draw a blue marble 120 times.

Step-by-step explanation:

Number of red marbles = 3

Number of blue marbles = 2

Total number of marbles =

Probability of drawing blue marbles =

=> = 0.4

Total number of draws = 300

So, in 300 draws Ellen should expect to draw a blue marble:

times.

And in case if red is needed, it becomes: times.

close to 120 but not exactly

Step-by-step explanation:

; )

step-by-step explanation: ; )

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square