A toy store owner gives 47 balloons to his customers. He has 7 balloons left. How many balloons did he start with?
1 answer:
Answer:
Step-by-step explanation:
As per the problem, we are given that
Toy store owner gave 47 balloons to his customers.
And there are 7 balloons left.
So we can find the total number of balloons the Toy store owner start with by adding the given numbers.
Hence total number of balloons the Toy store owner start with
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Answer:
a)0,45119
b)1
Step-by-step explanation:
For part A of the problem we must first find the probability that both people in the couple have the same birthday (April 30)
Now the poisson approximation is used
λ=nP=80000*1/133225=0,6
Now, let X be the number of couples that birth April 30
P(X ≥ 1) =
1 − P(X = 0) =
P(X ≥ 1) = 0,45119
B) Now want to find the
probability that both partners celebrated their birthday on th, assuming that the year is 52 weeks and therefore 52 thursday
Now the poisson approximation is used
λ=nP=80000*52/133225=31.225
Now, let X be the number of couples that birth same day
P(X ≥ 1) =
1 − P(X = 0) =
P(X ≥ 1) = 1