Page 1 - ln1
P. 1

SAI International School

                                                        Grade-VII

               Mathematics


               CHAPTER-3: DATA HANDLING, LESSON NOTE-4

                Module-4


               SUBTOPICS: Chance and Probability


               Chance and probability:


               Chance

               In our day to day life, there are so many situations when we say that this is impossible,
               or this is possible, or this may or may not possible. So the situations which may or may
               not happen have the chance to happen.

               This shows that it is not possible to throw 14 in the combination of two dices.


               It is certain that the sun will rise.

               It may or may not happen that a head has come when we flip a coin. As both, the head
               and tail have an equal chance.

               Probability


               Probability is the study of uncertainty The uncertainty of any doubtful situation is
               measured by means of Probability.

               This tells us the chance of happening some outcomes from the total possible outcomes.


               Probability of getting 5 = 1/6

               example: A coin is flipped to decide which team starts the game. What is the probability
               that your team will start?






               Answer: A coin has two possible outcomes Head and Tail.
               Probability of getting Head or Tail is equal.
               ∴ P (Starting game) = 1/2

               Imp.Notes: the probability of a sure event is 1


                                    And the probability of an impossible event is 0
   1