SSC MTS Model Paper 4

Question : 32 of 150

Marks: +1, -0

The average of nine consecutive numbers is 'n'. If the next two numbers are also included the new average will

Solution:

Average of 9 consecutive no.= n
∴ Fifth number = n
Tenth number = n + 5
Eleventh number = n + 6
New average

= { 9 { n } + \ { n } + 5 + { n } + 6 } /{ 11 }

= { 11 { n } + 11 } /{ 11 } = { ( { n } + 1 ) × 11 } /{ 11 } = { n } + 1

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