Independent work RFEI Mathematics №4 15 job

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Uploaded: 14.06.2013
Content: matematika_samost_4_15_z.rar 208,09 kB
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Independent work number 4 Mathematics 15 mission.
Answers to 15 job, in the form of a table.
A separate file contains all tasks.
Tasks for comparison:

Problem 1. On a shelf enclosed shopping center 6 packs of markers of different colors. How many color combinations can make of them, if the package of markers spread in a line?
A) 720; B) 24; B) 60.
Task 2. How many permutations of the letters of the word "business" in which the letter "b" in the first place, and the letter "c" - at the end of words?
A) 120; B) 24; B) 60.
Problem 3. What three-letter "words" can be formed from the letters of the word "accounting"? A word is any sequence of letters.
A) 10; B) 24; B) 60.
Problem 4. In how many ways can sit 6 participants at the round table?
A) 120; B) 15; B) 30.
Task 5: two hundred respondents were asked: "^^ VUT Do you have pets at home?". Eighty-four people responded positively. What is the relative frequency of a positive response in this experiment?
A) 0.84; B) 0.42; B) 0.16.
Problem 6. Of the proposed exam in math 100 questions a student has learned 75 questions. What is the probability that a student will get the exam question that he learned?
A) 0.75; B) 0.25; B) 0.34.
Task 7. The shopping the supermarket shelf are 20 packs of butter. Of these, 13 packs of chocolate butter, 7 packs of butter "Peasant". What is the probability of randomly take off the shelf a stack of butter "Peasant"?

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Problem 15. Find the expected number of defective cars from the 1000 cars are on the Kursk station, if each car may be defective with probability 0.03.
A) M (X) = 10; B) M (X) = 30; B) M (X) = 100.

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