SOLUTION: At the Glenridge quarry park ( a great place to check out if you have not been there yet), there are bullfrogs as big as a bread and butter plate. On a warm day they sit on the ban

Question 350747: At the Glenridge quarry park ( a great place to check out if you have not been there yet), there are bullfrogs as big as a bread and butter plate. On a warm day they sit on the bank and jump into the water if they hear you coming. A maximum of 3 bullfrogs can sit on one particular sloped area. The following shows a probability distribution of seeing x frogs there during a lunch time walk.
x 0 1 2 3
P(x) 0.2 0.62 0.13 0.05
Consider a random lunch time walk.
A. Find the probability that 1 or fewer are seen.
B. Find the expected number of bullfrogs.
C. Find the standard deviation of the number of bullfrogs.

Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
a)
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b)

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c)

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