D. 24x + 16y is your answer
Answer:
it is b
Step-by-step explanation:
A suitable probability calculator can tell you the probability is about 6.7%.
_____
The standard deviation of the distribution of sample means is the population standard deviation (6) divided by the square root of the sample size (√144=12). Thus, your threshold is about (19.25-20)/(6/12) = -1.5 standard deviations from the mean.
I believe the answer would be D 92 and 88 hope it helped