Examples: Probability Part 1 Video Lecture - Class 9

hello friends this video improbability
part three is brought to you by exam
viacom no more fear from example let's
say very very girls to understand the
concepts will acquire this is tossed all
the times and the following is 45 so we
have to find that preventive when do it
is 1
there's nothing but number of times -
the number of a fine spot rate is what
positive I put number of experiment is
similar to the quality of retain just
what number of times a violent
experience number of friends you got
take this fight 49 meters divided
midpoint by and note that these both
these values are between zero malady
values of 1801 please also note that if
we just add these two values you can
write this pain what do we this fine
this is one this the note that we have
covered all the sample space right the
sample space in this case will be hidden
till and we have covered the provider t
of
head and tail and that's why the value
is the addition of these two is one so
if the sponsor does not clear the
streets working for example I think that
the concepts would be clear why this
probability of ability because you have
covered all the events covers all the
events let's take two points are tossed
not when two coins are Daoist what is
how to do it they told you can it change
now since it is all done together tail
and head tail discussed it as one per we
are not saying that you are tossing one
point and then we are tossing one point
so you are getting head and tail until
in hand for that same way
assuming put the coins are same so this
is the monument is a fundamental
parameter so also to see they are saying
that two points are the assignment is
mean 500 times and we get two heads is
two dates one head which is one head it
is zero it so they are actually even if
it is two men one hand right so you can
write it as I can see that they are
three different kind of event you get
one head they exhibit and this third
time to hand comes consider five things
one hand comes and zero it comes what
this is what we have to find the parity
of each of the Soviets
well do you explain number of times to
accommodate specified number of expected
is find it so all this we get point
it's really romantic of one head is what
number of times 1 by number of times
when I talk of is 75 by a vendor this
type of it there is nothing but for a
fight so we provide at U of 0 it
so what number of times 0 I had even
talk that by next number thing is you go
ahead not participating you saw this you
get point please know what these are
events who will make numbers even one
even before they say it's you gotta go
these are three prominent if if you hide
all these people do get cheaper variety
of money plus you'll receive a minute
and that means it covers all liquid that
is to make you see is very may be true
two points sample space is zero anyone
here to it and they're covering all
these two events they see you and one
end that's why we got one as populated
please mode each of these violently is
begins different one so then you say
total provided is 1 that means it is
sure shot and if you throw to coin will
either get to hit all one hand odds that
is your shot and that is to also a you -
throw it they either get two heads
you hit one head or
isn't the only three stateö that will
happen right if the coin come back
properly it is not covered and that is
like the whole if you add this for well
things you get one thing it's your short
you will get either of these okay let's
take one for example so a die is thrown
hunt thousand times
so you throw this diet out at time the
frequency of the outcomes of one two
three four five six is given with our
team to find the variety of each other
you know third I thousand times number
of times you've got one was 179 number
of times you get two is 150 number of
times you get three is 107 number of
times you get four is 149 number of
times five is 175 is number of times you
get six is 190 now we have to find the
capacity of each of these events these
are all events so provided your one is
what prepared over for there where if
your event is nothing bad number of
times even by in this case is always so
next what about me Berkeley operating
one the penalty of getting one is
nothing but number of times one came
that is 179 by 1000 and this value is
point one seven it's really no bad way
of getting to is one number of times you
got to that is 150 by what makes time
it's 1000 at this point one five
submitting to variety of the d3 is
nothing quite number of times you've got
three that is gone seven by 1000 to this
point one five seven
so during poverty of getting four is
number
but all in this experiment this one
9,000 to this point one right similarly
number of gonna do getting five there's
number of men fine fine it's ready
number of gonna do getting six is number
of ninety got 60,000 at this point one
and if you had all these provided is if
we had point seven seven nine point one
five point five seven point nine oh nine
point one seven five point nine you will
get do that lied all these values you
get take it one point is therefore in
the calculation you add these okay that
means that this father's all the events
for propriety of one to provide a view
of six
it covers please no no once again that
all these where these each of these
provide is a bit into night one
it is never negative it is never greater
than money let's take you more example
so this is a telephone directory example
on the page of a telephone directory
there some two hundred telephone numbers
the frequency distribution of the unit
is it places given so when you say new
rent is it for example your number is
mind over six c18 you didn't visit is
this right that means the unit is it so
that the distribution of the unit
doesn't ask even though
so without looking at the page a pencil
displays on these numbers so this page
is a page and this page has some hundred
numbers so without going at the pencil
page one pencil is just place on one of
the number sent me to find what is the
probability off that visit the unit
basis six repeat the question this is
the telephone directory on one page of
the web for life in there's a few
hundred numbers and they are ending with
either 0 or 1 or 2 or 3 or 9 rated that
is the maximum ending number it ending
number can be 0 to 9 so each of the
frequency is given there are 22 numbers
which end with 0 26 number that ends
with 122 number that ends with two when
you do number the ends with 320 number
ends before similarly 20 number ends
midnight so that distribution is given
so if you add all these things you get
over it so they are 200 numbers that
they were correctly it is given now
without looking at the sheet we just the
pencil then we choose that number we
have to find that what is the
probability that that number ends with 6
that is nothing but we are looking for
probability of number ending with 6 that
is nothing but occurrence data so in
this case if you see number of I mean
how many numbers in with 6ot numbers and
how many numbers are there in the total
page one put the value point 0 7 and
that is that and please note this is
also between 0 & 1
please pay attention as question little
tricky to understand but not to kill you
so on so on a piece of paper let's
suppose there are 200 numbers later and
we have create a frequency distribution
for the last digit of the number right -
there are some 614 number that ends with
620 numbers end with - stuff like that
so without looking at the number if you
just pencil in money of the number you
have to find it what is the probability
that that particular number which we
have selected ends with things further
and we will find the number of numbers
where the last is 6 divided by the total
number of number for numbers so number
of phone numbers so the the count of
phone number that ends with 6 is 14 by
the count total one with a phone number
that is 200 on that particular page that
is the probability of getting a phone
number that ends with 6 if I just place
a pencil on these numbers without
looking at enough or if I choose the
number time comes are these 200 numbers
where are we of getting a number that
ends with 6 is 14 by 200 at this point
zero thank you
visit our website exam fee a.com to
watch more and more quality education
videos you can also attend 3 online
tests that are there in our website you
can also get access to tons of free
study materials and you can also find
free tutors and mentors in this website
thanks