A rectangular mat has a length of 12 in. and a width of 4 in. Drawn on the mat are three circles. Each circle has a radius of 2
in. Some friends play a game throwing coins onto the mat to see who can land a coin on one of the circles.
Assuming that a coin always lands on the mat, what is the probability that a coin thrown at random will land inside one of the circles?
Use 3.14 to estimate Pi
Enter your answer, as decimal rounded to the nearest hundredth.
Please help thank you so much!
Assuming that a coin always lands on the mat, what is the probability that a coin thrown at random will land inside one of the circles?
Use 3.14 to estimate Pi
Enter your answer, as decimal rounded to the nearest hundredth.
Please help thank you so much!
2 answers:
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Answer:
Step-by-step explanation:
The confidence interval for population proportion(p) is given by :-
, where = Sample proportion.
n= Sample size.
z* = Critical value.
Let p = Proportion of adults in the U.S. who have donated blood in the past two years.
As per given , we have
n= 2322
Sample proportion of adults in the U.S. who have donated blood in the past two years. :
By z-table , the critical value for 90% confidence : z*= 1.645
Then, the 90% confidence interval for the population proportion of adults in the U.S. who have donated blood in the past two years will be
Hence, the 90% confidence interval for the population proportion of adults in the U.S. who have donated blood in the past two years. =