
,

,

We find the probability of intersection using the inclusion/exclusion principle:

By definition of conditional probability,

For

and

to be independent, we must have

in which case we have

, which is true, so

and

are indeed independent.
Or, to establish independence another way, in terms of conditional probability, we must have

which is also true.
Answer:
11 units
Step-by-step explanation:
Given that t is on the line su , then
su = st + tu = 6 + 5 = 11
40/100 is just a bigger example of 4/10