Math 4th Grade Probability

Introduction to math 4th grade probability:

Generally probability is defined as the ratio of  the number do ways of an event occur to the total number of possible outcomes ,probability is used in the area of statistics ,finance ,gambling  and science .we are using some terms in probability now we are going to  discus about that terms and example problem on probability.

Terms- math 4th grade probability:

Probability
Event
Outcome
Experiment

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Probability:


It is used to measure how likely an event is.

Event:

It is defined as one or more outcomes

Outcome:

It is the result.

Experiment:

It is the situation we called as chance

Example - math 4th grade probability:

Suppose the rectangle is divided into 6 equal parts and those parts are colored using different colors, 3 pink, one yellow, 2 blue?

Solution:

Here the given problem is called as experiment, and outcome of those experiment are pink, yellow and blue

Now we can find the probabilities of each color

P (pink) =3/6

P (yellow) =1/6

P (blue) =1/6

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Example - math 4th grade probability:


A jar contains 45 marbles of different colors like magenta, yellow, white, it has 12 magenta, 19 yellow and reaming white, suppose you can choose the single marbles from the jar what is the probability for choosing magenta? A yellow marble? a White marble?

Solution:

Here the given problem is called as experiments and outcomes are red, yellow and white

Probabilities;

P (yellow) =19/45

P (red) =12/45

In these problem only the yellow and red and total count is given, there is no count for white so we can find the number of marbles in white color

Total number of marbles =yellow white + red

45=19+x+12

45=31+x

Subtract 31 on both sides we get the count of white marbles

45-31=x

So white marble =14

P (white) =14/45

Example - math 4th grade probability:

The below diagram is colored using different color find the probability of the green shaded portion?

Solution:

Here the rectangle is divided into 12 equal parts; here 5 equal parts are colored as green so the probability of the green color is 5/12