21.

Correlation indicates a joint relationship between two variables 'is said by

• Ferguson

• Lathrop

• Skinner

• Crowder

If the mental age of Peter is 15 yr and chronological age is 12 yr, then what will be the IQ of Peter?

• 80

• 125

• 100

• 115

Which one is correct for the following data?

-1,3,2,0,1,6,8,5,10,11,5

• Mean= Median =Mode

• Mean= Mode

• Mode= Median

• Mean= 5

The 200 tickets of a lottery were sold in which there was prize on 10 tickets. If Monica has purchased one ticket, what is the probability of winning a prize?

• 0.0005

• 0.05

• 0.005

• $\frac{199}{200}$

Characteristics of a good textbook of Mathematics should be

• there are many solved examples and some questions of exercise

• there are sufficient solved illustrations and more questions of exercise

• all the exercise questions are solved

• All of the above

A number gets reduced to one-third when 48 is subtracted from it. What will be two-third of that number?

• 24

• 72

• 96

• None of these

The total adults in a city are 6000. The various sections of them are indicated below.

I  $\to$ employes in the public sector
II $\to$ employes in the private sector
III$\to$ employes in the corporate sector
IV $\to$ self employed
V  $\to$ unemployed

What percentage of the employed persons is self employed?

• $5\frac{5}{19}$

• $19\frac{1}{5}$

• 20

• 5

Mathematics is the mirror of civilization is said by

• Locke

• Plato

• Hogben

• Dalton

Which of the following fraction is least?

• $\frac{28}{29}$

• $\frac{58}{59}$

• $\frac{34}{35}$

• $\frac{98}{100}$

In the given figure find the value of x

• 30°

• 60°

• 120°

• 150°