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A bag contains 100 tickets numbered 1, 2, 3, ...,100. If a ticket is drawn out of it at random, what is the probability that the ticket drawn has the digit 2 appearing on it?
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Important Questions on Probability
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A speaks the truth times out of , B times of out of .They both assert that a white ball is drawn from a bag containing balls ,all of differt colours. Find the probability of the truth of the assertion.
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In a shirt factory, processes A, B, C respectively manufacture %, %, % of the total shirts. Of their respective production, % , % and % of the shirts are defective. A shirts is selected at random from the production of a particular day. If it is found to be defective , what is probability that it is manufactured by the process C ?
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A pair of fair dice are rolled together till a sum of either 5 or 7 is obtained. The probability that 5 comes before 7 is
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For the above problem, the probability of coming before is:
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The probability of a bomb hitting a bridge is and two direct hits are needed to destroy it. What is the least number of bombs required so that the probability of the bridge being destroyed is greater than ?
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What is the probability of the destruction of the bridge if only bombs are dropped?
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Sanjay writes a letter to his friend from IIT, Kanpur. It is known that one out of 'n' letters that are posted does not reach its destination. If Sanjay does not receive the reply to his letter, then what is the prob ability that Kesari did not receive Sanjay's letter? It is certain that Kesari will definitely reply to Sanjay's letter if he receives it.
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A word of letters is formed from a set of different letters of the English alphabet (with replacement). Find out the probability that exactly letters are repeated.
