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Cards with numbers 1,2,3,....100 are placed in a box and mixed thoroughly.One card is drawn .What is the probability that the card drawn is :
(i)A prime number less than 30?
(ii)A multiple of 5 and 7?
(iii)A multiple of 5 or 7?

Here is the link for the answer to a similar query:
 https://www.meritnation.com/ask-answer/question/pls-explain-me-cards-marked-with-numbers-1-3-5-101-are-p/probability/6470706
https://www.meritnation.com/ask-answer/question/card-bearing-nos-1-3-5-35-are-kept-in-a-bag-a-card-is/probability/6777899
 

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P(E) = Number of favourable outcomes/ Total number of outcomes 1) P(a prime number less than 30) = 2,3,5,7,11,13,17,19,23,29/ 100 = 10/100 = 1/10 2) P(A multiple of 5 and 7) = 35,70/100 =105/100 = 2/100 = 1/50 Hope this helps!
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