Answer:
The observed tumor counts for the two populations of mice are:
Type A mice = 10 * 12 = 120 counts
Type B mice = 13 * 12 = 156 counts
Step-by-step explanation:
Since type B mice are related to type A mice and given that type A mice have tumor counts that are approximately Poisson-distributed with a mean of 12, we can then assume that the mean of type A mice tumor count rate is equal to the mean of type B mice tumor count rate.
This is because the Poisson distribution can be used to approximate the the mean and variance of unknown data (type B mice count rate) using known data (type A mice tumor count rate). And the Poisson distribution gives the probability of an occurrence within a specified time interval.
Answer:
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it's C
Answer:
x=5, y=6
Step-by-step explanation:
Double the second equation to give you:
-2x+2y=2
Now we add the 2 equations to eliminate the y:
3x-2y=3
+
-2x+2y=2
x=5
Now we substitute this value to give us:
3(5)-2y=3
15-2y=3
-12=-2y
y=6
You can substitute both these values in equation 2 to see if it works:
-x+y=1
-(5)+6=1 ✅
