A box contains cards bearing numners 11 12 13 14 15 16 17 ..........50. A cards is randomly drawn. What is the probalility that its bears a multiple of 7?
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Probability of getting a 1 digit no.=4/65
probability of getting a no.divisible by 5=1/5
probability of getting a odd no.less than 30=12/65
probability of getting a composite no. between 50 and 70=14/65
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