<span>There are 10,000 (10*10*10*10) possible sequences. There are 4C3 ways, 4, of having exactly three digits be the same value. The differing digit can be any of the four positions. There are 10P2 ways, 90 (10*9), to choose the digits of the sequence since we have 10 choices for the digit to be repeated, then 9 more options or the differing digit. The product of the combination arrangements and permutation selection, 4*90, shows there are 360 sequences with three of the same digit. Thus the probability is 360/10,000 or 0.036 or 3.6%.</span>
F(x) = 1.50x + 12.50
f(18) = 1.50(18) + 12.50
f(18) = 27 + 12.50
f(18) = 39.50 ....this is the amount Kelsey paid for 18 movies in 1 month
Answer:
<u>Use Two sided t-test</u>
<u>Step-by-step explanation:</u>
Note that, there are other tools to test for significant difference such as simple regression or multiple regression<em> but when comparing the results of two groups in terms of which is higher or lower</em>, then a two sided t-test would be best appropriate.
Since we want to know if there is a significant difference between the number of tornadoes in August and the number of tornadoes in October on average we use the two sided t-test because a Two sided t-test can show the possibility of positive or negative differences.
The answer is the 3rd one
The answer would be 345.
To solve, simply lay your equation
3(125−4)−18
Step 1: Solve the parenthesis.
=(3)(121)−18
Step 2: Multiply parenthesis by 3.
=363−18
=345
So the answer for this problem is 345.
