Probability models examples - Math, Class 9 Video Lecture - Class 9 | Best Video for Class 9

The FIFA World Cup has been
held 19 times since 1930.
Brazil has won the cup
five times since it began.
Based on this data,
estimate the probability
that Brazil will
win the next World
Cup to be held in Rio
de Janeiro in 2014.
Now, this isn't going to be
that great of an estimate.
The world has changed
a lot since 1930.
I'm assuming that the
Brazilian team has.
And we're not even
looking at the makeup
of the team or their win-loss
record, or who else is strong,
what's Spain doing,
et cetera, et cetera.
We're just doing kind of
a very superficial out
of 19 times since 1930, how
many times has Brazil won?
And they won five times.
So we could say that, well,
our very, very rough estimate
of the probability that
they win is 5 out of 19.
And I wouldn't
trust this too much.
This is a very, very,
very rough estimate.
It's really not looking at where
the Brazilian team is today.
But I'd go with that
for this problem.
Let's do a couple more of these.
In his NFL career,
Chad Pennington
had 2,471 attempted passes
and 1,632 completed passes.
Based on his record, estimate
the probability to the nearest
hundredth that Chad
will complete a pass
on his next attempt, assuming
that he is still active.
So this is going to be
1,632 divided by 2,471.
And it looks like that might
be an acceptable format here.
1,632 divided by 2,471.
And we got it right.