Answer:
Step-by-step explanation:
Lets look at the first pick. There are 9 items that can be choosen, one that cannot. So the chance to not pick the one is 9/10.
All the other attempts are the same and have 9/10 chance. (as replacement happens)
Now these events are independent of eachother so the combined chance is
(9/10)^10
For the formula:
Number of items: n
One pick is: (n-1)/n
N pick together is [(n-1)/n]^n
Answer:
distance covered in 2 hours = 80 km
distance covered in 1 hour = 80÷2 = 40 km
distance covered in 7/2 hours = 40 × 7/2
= 140 km
(3 1/2hours = 7/2 hours)
I believe 67 is the correct answer
Answer:
B. is your answer
Step-by-step explanation:
First you multiply both sides by "x" and you get
12x - 4 = 3x
now add 4 to both sides and you get
12x = 3x + 4
now subtract "3x" from both sides and you get
9x = 4
divide both sides by 9 and you get
x = 4/9
You would -a to get 6x=5-a then divide by 6 which you would get your final answer which is x=5-a/6
