IQ of a prson is given by formula
IQ=MA/CA*100,
where MA is mental age and CA is chronologcal age. if 80
let MA=x
CA=12 yrs
IQ=MA/CA*100
=x/12*100
25x/3
80<_IQ<_140
80<_25x/3<_140
240<_25x<_420
48/5<_x<_84/5
9.6<_x<_16.8
It is the answer
CA=12 yrs
IQ=MA/CA*100
=x/12*100
25x/3
80<_IQ<_140
80<_25x/3<_140
240<_25x<_420
48/5<_x<_84/5
9.6<_x<_16.8
It is the answer