The mean of the problem is 37.3. All you need to do is add all the numbers together and then divide them by the amount of numbers. So I added them all and divided by 10.
The picture is off point so I can’t read the entire paper!! Sorry and GOOD LUCK
To find the probability of both of these occurring, you will multiply the probability of choosing a blue marble by the probability of choosing a purple marble (with no replacement after the first one).
Probability of choosing a blue marble: 17/120
Probability of choosing a purple marble: 18/119
17/120 x 18/119 = 3/140
You will have a 3/140 chance of both of these occurring.
Because α varies directley to β
(k = constant)
α=7 when β=2
7= 2k
k=
so when α=21
21=
b
b= 6
