a car is drawn at random from a box containing 12 cards numbered 1,2,3...13. Find the probability of drawing. 1) a 7 2) a prime number 3) a perfect square 4) a negative number
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Explanation:
There are total 12 cards numbered from 1-13
1) a 7=p(7)=1/12
2) a prime number= p(pn) =7/12
3) a perfect square=p(ps) =2/12
4) a negative number =p(nn) = 0/12
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