एक गतिविधि का आशावादी,संभवतः और निराशावादी समय क्रमशः 6, 9 और 12 दिन है। गतिविधि का मानक विचलन और प्रसरण क्रमशः ________ है।

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JKSSB JE CE 2021 Official Paper Shift 3 (Held on 27 Oct 2021)
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  1. 1 और 2
  2. 1 और 1
  3. 2 और 1
  4. 2 और 2

Answer (Detailed Solution Below)

Option 2 : 1 और 1
Free
ST 1: JKSSB JE - Surveying
20 Qs. 20 Marks 20 Mins

Detailed Solution

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संकल्पना:

आशावादी समय (to), निराशावादी समय(tp), संभवतः समय(tm):

प्रत्याशित समय: 

मानक विचलन: 

PERT नेटवर्क के लिए,

प्रसरण निम्न द्वारा दिया जाता है:

गणना:

दिया गया है:

to = 6, tm = 9, tp = 12

मानक विचलन: 

 

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