Aptitude - Aptitude-Algebra

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The licence plates of cars in a particular jurisdiction have three digits ranging from 000 to 999. To pass the time on a long trip, Suzie recorded the last two digits of 20 oncoming cars. What is the probability that at least two of these pairs of numbers match?

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• b
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• d

The odds in favour of getting rain in a desert during any particular year are 3:97. The probability of rain in a given year is?

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• b
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• d

You are dealt five cards from a deck of 52. What is the probability that you will have some red and some black cards?

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• b
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• d

A game consists of tossing a coin three times. If you toss three heads or three tails, you win. If you toss anything else, you lose. What is the probability of winning this game?

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• b
• c
• d

A bag contains 4 white buttons. How many black buttons must be added so there is an even chance of picking a white button?

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• b
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• d