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The sides of a fair 5 -sided spinner are marked 1,1,2,3 and 4. It is spun until the first score of 1 is obtained. Find the probability that it is spun: exactly twice

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Important Questions on The Binomial and Geometric Distributions

EASY
AS and A Level
IMPORTANT
The sides of a fair 5 -sided spinner are marked 1,1,2,3 and 4. It is spun until the first score of 1 is obtained. Find the probability that it is spun: at most five times
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AS and A Level
IMPORTANT
The sides of a fair 5 -sided spinner are marked 1,1,2,3 and 4. It is spun until the first score of 1 is obtained. Find the probability that it is spun: at least eight times.
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AS and A Level
IMPORTANT
It is known that 80% of the customers at a DIY store own a discount card. Customers queueing at a checkout are asked if they own a discount card. Find the probability that the first customer who owns a discount card is: the third customer asked
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AS and A Level
IMPORTANT
It is known that 80% of the customers at a DIY store own a discount card. Customers queueing at a checkout are asked if they own a discount card. Find the probability that the first customer who owns a discount card is:not one of the first four customers asked.
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AS and A Level
IMPORTANT
It is known that 80% of the customers at a DIY store own a discount card. Customers queuing at a checkout are asked if they own a discount card. Find the probability that the first customer who owns a discount card is: Given that 10% of the customers with discount cards forget to bring them to the store, find the probability that the first customer who owns a discount card and remembered to bring it to the store is the second customer asked.
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AS and A Level
IMPORTANT
In a manufacturing process, the probability that an item is faulty is 0.07. Items from those produced are selected at random and tested.Find the probability that the first faulty item is: the 12 th item tested. What assumptions have you made about the occurrence of faults in the items so that you can calculate the probabilities?
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AS and A Level
IMPORTANT
In a manufacturing process, the probability that an item is faulty is 0.07. Items from those produced are selected at random and tested.Find the probability that the first faulty item is: not one of the first 10 items tested. What assumptions have you made about the occurrence of faults in the items so that you can calculate the probabilities?
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AS and A Level
IMPORTANT
In a manufacturing process, the probability that an item is faulty is 0.07. Items from those produced are selected at random and tested.Find the probability that the first faulty item is: one of the first eight items tested. What assumptions have you made about the occurrence of faults in the items so that you can calculate the probabilities?