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31 CHAP

31 CHAP - 3 1 P ROBABILITY IMPORTANT F ACTS A ND F ORMULA...

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31. PROBABILITY IMPORTANT FACTS AND FORMULA 1.Experiment :An operation which can produce some well-defined outcome is called an experiment 2.Random experiment: An experiment in which all possible outcome are known and the exact out put cannot be predicted in advance is called an random experiment Eg of performing random experiment: (i)rolling an unbiased dice (ii)tossing a fair coin (iii)drawing a card from a pack of well shuffled card (iv)picking up a ball of certain color from a bag containing ball of different colors Details: (i)when we throw a coin. Then either a head(h) or a tail (t) appears. (ii)a dice is a solid cube, having 6 faces ,marked 1,2,3,4,5,6 respectively when we throw a die , the outcome is the number that appear on its top face . (iii)a pack of cards has 52 cards it has 13 cards of each suit ,namely spades, clubs ,hearts and diamonds Cards of spades and clubs are black cards Cards of hearts and diamonds are red cards There are 4 honors of each suit These are aces ,king ,queen and jack

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31 CHAP - 3 1 P ROBABILITY IMPORTANT F ACTS A ND F ORMULA...

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