Answer:
x=-4/3
Step-by-step explanation:
Answer:
8(3j-2)
Step-by-step explanation:
The standard deviation of the sample proportion is:

The z-score for 0.7 is:

Reference to a standard normal distribution table shows that the probability that at least 70% of the sample prefers coke to pepsi is 0.8944 or 89.44%.