Quiz 111
2^{nd} 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

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

Quiz(2) 111
2^{nd} 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

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

Quiz(2) 111
2^{nd} 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