Answer:
A
Step-by-step explanation:
Could you possibly be more specific?what math problem did they solve? i can help but just be a little more specific so i can answer your question
-r
Step by step:
7r+(-8)
7r+(-8r)
-r
The permutation and the combination would be ^{15}P_4= 32760 and ^{15}C_4 = 1365.
<h3>What is the formula used for permutation and combination?</h3>
To calculate permutation
Given; n = 15, k = r = 4
Therefore, ^{15}P_4 = 32760
For combination
Learn more about permutations here:
brainly.com/question/13443004
#SPJ1
Answer:
48.6666666667 or
Step-by-step explanation:__
__(bar notation over 67)
48.67