Answer:
The probability 
Step-by-step explanation:
From the question we are told that
The population proportion is p = 0.90
The sample size is n = 30
Generally mean of the sampling distribution is 
Generally the standard deviation is mathematically represented as

=> 
=> 
Generally the he probability that the proportion surviving for at least five years will exceed 80%, rounded to 5 decimal places is mathematically represented as

Generally 
So

From the z-table 
So

28/32 reduces to 7/8
42/48 reduces to 7/8
equivalent fractions are proportionate....so yes, they are proportionate
The unit fraction of 7/8 is 1/8
Answer:
1
Step-by-step explanation:
Answer:
78
Step-by-step explanation: