If Betty has 5 blue marbles,3 red marbles and 1 yellow marble what is the chance sus is will pick a red marble

33% or 1/3

Step-by-step explanation:

3 RED MARBELS/9 MARBLES=

3/9=

1/3=

33% chance of getting a red marble.

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HOPE THIS HELPS, BRAINLIEST PL

Mean = 1.013

Step-by-step explanation:

We are given that the lifetime risk of developing pancreatic cancer is about one in 78 (1.28%).

Let X = the number of people you ask before one says he or she has pancreatic cancer.

So, in geometric distribution; X ~ Geo(p)

where p is proportion of people who does not have pancreatic cancer i.e.;

1 - 0.0128 = 0.9872

So, X ~ Geo(0.9872)

Now, the mean of geometric distribution is =

So, Mean of variable  = (1/0.9872) = 1.013 .