Answer:
The fraction is 470/1000, which can be simplified to 47/100, and that is 47%.
Step-by-step explanation:
Basically you take what is asked for and you divide it by the total amount.
470 is the amount of girls as contestants.
1000 is the total amount of contestants.
And that gives you the ratio 470/1000.
The last one- its the only one that applies to the 4* rule.
Answer: Option D

Step-by-step explanation:
We can use the binomial formula to solve this problem.

Where p is the probability of success, n is the sample size and x is the number of successes expected.
Note that in this case
(probability that a part is defective)


Then we calculate the probability

