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Study the following table and answer the...

Study the following table and answer the questions

वर्ष 2006 से 2008 तक विज्ञानं समूह में प्रत्येक वर्ष पास होने वाले छात्रों की औसत संख्या उसी समूह में वर्ष 2009- 11 तक पास होने वाले छात्रों की औसत संख्या के बीच अंतर बताये ।

A

47

B

57

C

74

D

141

लिखित उत्तर

Verified by Experts

Candidates qualified under science discipline
In year 2006 `=(780xx40)/(100)=312`
Year 2008 `rArr(500xx45)/(100)=225`
Year 2009 `rArr620xx(45)/(100)=279`
Year `2010rArr900xx(35)/(100)=315`
Year `2011rArr 850xx(42)/(100)=357`
Required average difference
`=(1)/(3){(279_315+357)-(312+273+225)}`
`=(1)/(3)(951-810)=(1)/(3)xx141=47`
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