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SilvaFigart SilvaFigart
  • 20-04-2014
  • Mathematics
Answered

The average IQ of 4 people is 110. If three of these people each have an IQ of 105, what is the IQ of the fourth person ?

Verified Answer :

deathstrike001
deathstrike001 deathstrike001
  • 21-04-2014

(105+105+105+x)/4=110
multiply both sides by 4
105+105+105+x=440
315+x=440
x=125

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