# يسرى عبداللطيف طاشكندي

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 Name: Student ID:
Quiz 111

2nd semester

1428-1429

Q1: A student is to answer 7 out of 10 question an examination. Find the probability of:

1)      She must answer at least 3 of the first 5 question?

2)      She must answer 2 of the first 3 question and 2 of the last 3 question?

3)      She must answer one of  the first 5 question?

Q2: A Card is weighted so that the outcomes proceed the following probabilities

 outcome 2 3 5 6 8 9 probability 0.1 0.05 0.25 0.15 0.2 0.25

Find the probability of

1)      The card take at lest number 6?

2)      The card take number more than 8?

3)      The card take odd number?

Good Luck

Yusra Tashkandi

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 Name: Student ID:
Quiz(2) 111

2nd semester

1428-1429

Q1: The probability that a patient recovers from a delicate heart operation is 0.9 . What is the probability that exactly 5 of the next 7 patients having this operation survive?

Q2: The probabilities are 0.4, 0.2, 0.3 and 0.1, respectively, that a delegate to a certain convention arrived by air, bus, automobile, or train. What is the probability that among 9 delegates randomly selected at this convention, 3 arrived by air, 3 arrived by bus, 1 arrived by automobile, and 2 arrived by train?

Q3: A secretary makes 2 errors per page, on average. What is the probability that on the next page he will make 4 or more errors?

Good Luck

Yusra Tashkandi

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

 Name: Student ID:
Quiz(2) 111

2nd semester

1428-1429

Q1: A homeowner plants 6 bulbs selected at random from a box containing 5 tulip bulbs and 4 daffodil bulbs. What is the probability that he planted 2 daffodil bulbs and 4 tulip bulbs?

Q2: The probability that a person, living in a certain city, owns a dog is estimated to be 0.3. Find the probability that the tenth person randomly interviewed in that city is the fifth one to own a dog.

Q3: Suppose that, on average, 1 person in 1000 makes a numerical error in preparing his income tax return. If 10,000 forms are selected at random and examined, find the probability that 6, 7, or 8 of the forms contain an error.

Good Luck

Yusra Tashkandi