21.

$$\begin{gathered} \mathrm{If} ( \mathrm{a} + \mathrm{b}) : ( \mathrm{b} + \mathrm{c}) : ( \mathrm{c} + \mathrm{a}) = 6 : 7 : 8 \mathrm{and} \\ \mathrm{a} + \mathrm{b} + \mathrm{c} = 14, \mathrm{then} \mathrm{the} \mathrm{value} \mathrm{of} \mathrm{c} \mathrm{is} \mathrm{equal} \mathrm{to} \end{gathered}$$

• 6

• 7

• 8

• 14

$\mathrm{What} \mathrm{is} \mathrm{the} \mathrm{value} \mathrm{of} \frac{1}{2}\% \mathrm{in} \mathrm{decimals} ?$

• 0.0005

• 0.005

• 0.05

• 0.5

The students (in Lakh) who appeared and ratio of pass and fail in different cities are given in the following table. Read carefully and answer following questions

How many applicants pass in City E

• 13000

• 1110000

• 113000

• 111000

Histogram is used to represent

• non-continuous grouped frequency distribution

• ungrouped frequency distribution

• continuous grouped frequency distribution

• All of the above

The students (in Lakh) who appeared and ratio of pass and fail in different cities are given in the following table. Read carefully and answer following question

Which city has highest number of failures in exam ?

• F

• C

• B

• D

Percentage of girls in different school are plotted in following graph. Read carefully and answer following questions

Total number of boys in School T

• 500

• 600

• 750

• 850

Suitable method of Arithmetics teaching is

• project method

• demonstration method

• analytic method

• None of the above

2x + 4y - 8xy - 1 is equal to

• $\left(1 + 4\mathrm{y}\right)\left(2\mathrm{x} - 1\right)$

• $\left(1 - 4\mathrm{y}\right)\left(2\mathrm{x} - 1\right)$

• $\left(1 - 4\mathrm{y}\right)\left(2\mathrm{x} + 1\right)$

• None of the above

If 3x + 7y = 75, 5x - 5y = 25, then the value of (x + y) is equal to

• 17

• 16

• 18

• 15

Neena and Meena started a business with investment of Rs. 30000 and Rs. 45000, respectively. What will be the share of Meena from the profit on Rs 150000 after 2 yr ?

• Rs. 30000

• Rs. 45000

• Rs. 75000

• None of these