Probaility Distribution 10 Probability Distribution of 3 Defective Items out of 12

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Probability Distribution - 10 - Basics

Problem:
A box contains 12 items, of which 3 are defectives. A sample of 3 items is selected from random. If X represents the number of defective items in the 3 selected items, describe random variable X completely and obtain its expectation.

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[angedieka]

Hello sir! please can you help me out here: In batch of 100 screws, a maximum of 3 can be defective. A random sample of 20 screws are taken. How many defective parts are allowed in this sample considering all scenarios probabilities less than or equal to 90%?

[manuelseque]

Thanks a lot for your effectice explanation. I have a question, is it possible if you do not mind to explain the same exercise without using combinatorics

[rajnibala]

Plz give the sol. For
4items are selected out if 9non defective n 6defective items. Find prob. Of first two are non def. And last two are def.
Two are non def. And two are def

[pushkarmahajan]

Why did you divide by 12c3 while calculating no possible defect

[pruthibipattanaik]

The Assignment Problem Example

Inspection Area

B

4

7

8

16

11

C

6

7

12

13

17

Assembly Line

1

2

3

4

5

A

10

13

14

19

D

10

9

14

17

20

E

12

14

15

17

19

Under current arrangement, assignment of inspection areas to the assembly lines are 1 to A, 2 to B, 3 to C, 4 to D, and 5 to F

This arrangement requires 10+7+12+17+19 = 65 man minutes.

Sir please give me the solution

[Nellebell]

Thank you so much! This helped me a lot