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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 ?

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 ?
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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 ?

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User Jagadeesh Govindaraj
by
7.8k points

1 Answer

3 votes
(105+105+105+x)/4=110
multiply both sides by 4
105+105+105+x=440
315+x=440
x=125
answered
User Teymur Mardali
by
8.3k points
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