DHS 18.1 - Option 3. Decisions Ryabushko AP

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Uploaded: 09.11.2016
Content: 3v-IDZ18.1.doc (92,5 kB)


Solve the following problems (1 - 6)

1.3. Students in this course learn 12 disciplines. The schedule of classes every day is included on the 3 items. training schedule for each day can be made how many ways?

2.3. From bushings party made for a change of a turner, randomly selected for control 10 pcs. Find the probability that among the two selected plugs - the second grade, when in all 25 games of first grade plugs and 5 - second.

3.3. The unit consists of three radio tubes. The probability of failure during the warranty period for these are, respectively, 0.3; 0.2; 0.4. What is the probability that during the warranty period will fail: a) at least two radio tubes; b) no radio tubes; c) at least one vacuum tube?

4.3. Among admitted to the assembly of parts 30% - with the plant number 1, and the rest - from the factory number 2. The probability of marriage for the plant number 1 is equal to 0.02 for the plant number 2 - 0.03. Find: a) the probability that randomly taken part standard; b) the probability of production of items taken at random at the plant number 1, if it was a standard.

5.3. Among the blanks, a work produced on average 4% does not satisfy the standard. Find the probability that taken for control does not satisfy the standard requirements include 6 pieces: a) at least five; b) not more than five; c) two.

6.3. The probability of occurrence of an event in each of the independent trials is 0.2. Find the probability that the event occurs 25 times in 100 trials.

Additional information

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)


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