Abag contains 5 yellow, 6 red, and 4 green marbles. two marbles are drawn. the first is replaced before the second is drawn. a random variable assigns the number of green marbles to each outcome. calculate the expected value of the random variable. a 0.76 c. 0.27 b. 1.07 d. 0.53

d. 0.53

Step-by-step explanation:

Given : Number of green marbles = 4

Total number of marbles = 15

The probability of drawing a green marble :-

Since two marbles are drawn by replacement , then the probability of drawing green marble remains same in both cases.

Now, the expected value of the random variable will be :-

666666666666666666666

6

6

6

6

6

6

6

66

6

6

6

66

6

66answer:

step-by-step explanation:

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation: