Home
Class 11
MATHS
IQ of a person is given by formula: IQ=(...

IQ of a person is given by formula: IQ`=(M A)/(C A)xx100\ ,\ w h e r e\ M A` is mental age and CA is chronological age. If `80lt=I Qlt=140` for a group of 12 year children, find the range of their mental age.

Text Solution

Verified by Experts

The correct Answer is:
N/a
Given that : CA = 12 years
Now, `IQ = (MA)/(CA)xx100`
and ` 80 le IQ le 140`
`rArr 80 le (MA)/(CA)xx100 le 140`
`rArr 80 le (MA)/(12)xx 100 le 140`
`rArr 80 le (MA)/(3)xx 25 le 140`
`rArr 240 le MA xx 25 le 420`
`rArr 9.6 le MA le 16. 8`
Which is the required range of mental age.
Promotional Banner

Topper's Solved these Questions

  • LINEAR INEQUALITIES

    NAGEEN PRAKASHAN ENGLISH|Exercise NCERT QUESTION|51 Videos

  • LIMITS AND DERIVATIVES

    NAGEEN PRAKASHAN ENGLISH|Exercise Miscellaneous Exercise|30 Videos

  • MATHEMATICAL REASONING

    NAGEEN PRAKASHAN ENGLISH|Exercise Misellaneous exercise|7 Videos

Similar Questions

Explore conceptually related problems

IQ of a person is given by the formula IQ = (MA)/(CA)xx100 where MA = mental age and CA = chronological age. If IQ for a group of 10 years children is given by the inequation 70 le IQ le 140 , find the range of their mental age.

Water in a canal, 30\ d m\ w i d e\ a n d\ 12 d m\ d e e p ,\ is flowing with a velocity of 20 k m\ p e r\ hou rdot How many area will it irrigate in 30min, if 9\ c m of standing water is desired?

An insurance company selected 2000 drivers at random (i.e., without any preference of one driver over another) in a particular city to find a relationship between age and accidents. The data obtained are given in the following table: Find the probabilities of the following events for a driver chosen at random from the city: (i) The driver being in the age group 18−29 years and having exactly 3 accidents in one year. (ii) The driver being in the age group of 30−50 year and having one or more accidents in a year. (iii) The number of drivers having no accidents in one year

An alloy of Pb-Ag weighing 1.08g was dissolved in dilute HNO_(3) and the volume made to 100 mL.A ? Silver electrode was dipped in the solution and the emf of the cell dipped in the solution and the emf of the cell set-up as Pt(s),H_(2)(g)|H^(+)(1M)||Ag^(+)(aq.)|Ag(s) was 0.62 V . If E_("cell")^(@) is 0.80 V , what is the percentage of Ag in the alloy ? (At 25^(@)C, RT//F=0.06 )

The metal-insoluble salt electrode consists of a metal M coated with a porous insoluble salt MX In a solution of X^(-), A good example is Ihe silver, silver-chloride electrode for which the half-cell reaction is AgCI(s)+e Leftrightarrow Ag(s) + CI (aq), where, the reduction of sold silver chloride produces solid silver and releases chloride ion into solute for the cell M(s)|M^(2+) (aq)||Ag^(+) (aq)|Ag(s)" "E_(M//M^(2+))^(@)=+2.37V and E_(Ag//Ag)^(@)=+0.80V The reaction: 1/2H_(2) (g) +AgCl(s) to H^(+) (aq)+Cl^(-) (aq)+Ag(s) occurs in the galvanic cell

Water in a canal, 30\ d m\ w i d e\ a n d\ 12 d m\ d e e p ,\ is flowing with a velocity of 20 k m\ p e r\ hou rdot How many area will it irrigate in 30\ m in ,\ if 9\ c m of standing water is desired?

The percentage of marks obtained by a student in the monthly unit tests are given below: U n i t\ t e s t : I I I I I I I V V P e r c e n t ag e\ of\ m a r k s\ ob t a i n e d : 58 74 76 62 85 Find the probability that the student gets: (i) a first class i.e. at least 60% marks (ii) marks between 70% and 80% (iii) a distinction i.e. 75% or above (iv) less than 65% marks.

The scalars la n dm such that l vec a+m vec b= vec c ,w h e r e vec a , vec ba n d vec c are given vectors, are equal to

The length of a room is one and a half times its breadth. The cost of carpeting the room at R s .3.25\ p e r\ m^2\ i s\ R s .175.50 and the cost of papering the walls at R s .1.40\ p e r\ m^2i s\ R s .240.80 . If 1 door and 2 window occupy 8\ m^2, find the dimensions of the room.

The length of a room is one and a half times its breadth. The cost of carpeting the room at R s .3.25\ p e r\ m^2\ i s\ R s .175.50 and the cost of papering the walls at R s .1.40\ p e r\ m^2i s\ R s .240.80 . If 1 door and 2 window occupy 8\ m^2, find the dimensions of the room.