For every truck a police officer encounters she writes down T, for every car C, for every van V, and for every vehicle that is not a car, truck or van O (for "other"). Estimate the probability that the next vehicle the police officer encounters is not a car, truck, or van.

T T T C V O O V C T T C C C C C C V O

5 = T

8 = C

3 = V

3 = O

which means its other because it said it is not a car, truck or van so its other meaning O

O = other

O

Step-by-step explanation: Theirs really nothing to it just pay attention to the hint :)

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for