According to the records of a health insurance company 60% of its policyholders submit a claim during a oneyear period. Answer the following questions.
question1 ) Find the probability that exactly 18 out of 30 randomly selected policyholders will submit a claim during a oneyear period. (Round your answer to 4 places after the decimal point).
a) none
b) 0.5689
c) 0.1474
d) 0.0129
Question 2. Find the probability that at most 12 out of 30 randomly selected policyholders will submit a claim during a oneyear period. (Round your answer to 4 places after the decimal point).
0.0212 

None of the provided answers 

0.0129 

0.5785 Question 3. How many policyholders are expected by this company to submit a claim during a oneyear period? a) 12 b) none c) 18 d) 9 Question 4. What is the standard deviation of the number of policyholders which will submit a claim during a oneyear period? (Round you answer to 2 places after the decimal point). a) 7.20 policyholer b) 5.34 c) none d) 2.68 policy holder 
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