Answer:
the answer is d
Step-by-step explanation:
because i said so
but also i figured it out
This is a combination problem.
Given:
12 students
3 groups consisting of 4 students.
Mark can't be in the first group.
The combination formula that I used is: n! / r!(n-r)!
where: n = number of choices ; r = number of people to be chosen.
This is the formula I used because the order is not important and repetition is not allowed.
Since Mark can't be considered in the first group, the value of n would be 11 instead of 12. value of r is 4.
numerator: n! = 11! = 39,916,800
denominator: r!(n-r)! = 4!(11-4)! = 4!*7! = 120,960
Combination = 39,916,800 / 120,960 = 330
There are 330 ways that the instructor can choose 4 students for the first group
Answer:
7. D. 130² ft.
8. She can feed 6 friends.
9. There are 7 trees in each row.
10. B. 490.
22.5/5 = 4.5
For every 4.5 minute, she runs 5 km
I don't think you can convert anything out of a decimal because 0.232 is already a decimal!
