Answer:
6/9
Step-by-step explanation:
Say the question more clearly please
we know that
In an Arithmetic Sequence the difference between one term and the next is a constant

where
a1 is the first term
d is the common difference between terms
n is the number of months (in this problem)
case a) Mandy


------> equation 
in this equation the first month is April
case b) Bill


-------> equation 
In this equation the first month is May
With the equation
and the equation
calculate the attached table
therefore
the answer is
December
Answer: 5
Step-by-step explanation:
= P(roll 4) = 1/6
= Expected # of 4 in 30 rolls = (1/6)*30 = 5
Therefor, the answer is 5
~ Hopefully this helps:) Mark me the brainliest:)!!
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