A factory makes car batteries. The probability that a battery is defective is 1/13. If 200 batteries are tested about how many are expected t be defective. A. 20
B. 15
C. 187
D. 13

defective battery=200×1/13=15.3=15 is your answer

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;