Answer: Option 'D' is correct.
Step-by-step explanation:
Since we have given that

and

So, we need to find,

(∵they are independent events .)

So, option 'D' is correct.
Answer: There are 7 nickles, 21 dimes and 16 quarters.
Step-by-step explanation:
Since we have given that
Number of coins = 44
Let the number of nickels be 'x'.
Let the number of dimes be '3x'.
Let the number of quarters be

According to question, we get

So, there are 7 nickles,
3x =

Hence, there are 7 nickles, 21 dimes and 16 quarters.
I think (2,3) but I’m not completely sure
I'm not sure about this but will give it a try:
Let f(n) = 2xⁿ - 2
Then f(3) = 2x³ - 2
So, f(2) = 2x² - 2