Question

cards bearing numbers 3 to 20 are placed in a bag and mixed thoroughly. a card is taken out from the bag at random. what is the probability that the card taken out is composite number

Answer 1

total outcomes are 18

sample space={4,6,8,9,20,12,14,15,16,18,20}

favourable outcomes are 11

so p(e)=11/18

Answer 2

TOTAL CARDS = 17[20-3]

P[A]=PROBABILITY OF GETTING A COMPOSITE NUMBERS

=TOTALCOMPOSITE NUMBER CARDS /TOTAL CARDS

=11/17 [TOTAL COMPOSITE NUMBERS ARE 11]

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