With help of permutations and combinations we can calculate the probability of some event to happen,if the event is composed from several other events (when is a list)
If the order of the events doesn't matter then we have a combination, if the order do matter then we have a permutation. We can say that a permutation is an ordered combination.
The number of permutations of n objects taken r at a time is determined by the following formula:P(n,r)=n!(n-r)!
<span>The number of combinations of n objects taken r at a time is determined by the following formula: C(n,r)=n!/(n-r)!r!</span>
Answer:1/3
Step-by-step explanation:
5/15
Answer:
0.85,8/9,0.92
Step-by-step explanation:
8/9=0.8888
Answer:
y=3x-21
Step-by-step explanation:
y=mx+c
y=3x+c
3=24+c
c=-21
y=3x-21
So, you basically plug the values into the formula you have been given. D divided by T gives you the average speed.
We know the distance D is 145 miles and the Time T is 2.5 hours.
So, 145/2.5=58
Therefore, the cars average speed was 58 miles / hour