Free Data Handling 01 Practice Test - 8th Grade 

The probability of getting a white ball is 0 as there are 0 white balls.

$\text{Probability}=\frac{\text{Number of favourable outcomes}}{\text{Total Number of outcomes}}$

Number of green balls (favourable outcomes) =8

Total number of balls (total outcomes) = 14

So probability of getting a green ball 
$=\frac{\text{Number of green balls}}{\text{Total number of balls}}$ $=\frac{8}{14}$ $=\frac{4}{7}$

$\text{Probability}=\frac{\text{Number of favourable outcomes}}{\text{Total Number of outcomes}}$

Number of white squares (favourable outcomes) = 32

Total number of squares or outcomes = 64

So probability of coin falling in a white square
$=\frac{\text{Number of white squares}}{\text{Total number of squares}}$
$=\frac{32}{64}$
$=\frac{1}{2}$

The cards are numbered as 1,2,3,4,5,6,7

Total number of outcomes = 7

Number of odd numbers (favourable outcomes) = 4

Number of even numbers (favourable outcomes) = 3

$\text{Probability}=\frac{\text{Number of favourable outcomes}}{\text{Total Number of outcomes}}$

Probability of getting odd number
$=\frac{\text{Number of odd numbered cards}}{\text{Total number of cards}}$;
$=\frac{4}{7}$

Probability of getting even number
$=\frac{\text{Number of even numbered cards}}{\text{Total number of cards}}$
$=\frac{3}{7}$

Probabilities are different. Hence, the statement is false.

$\begin{array}{cc}\text{Height}& \text{Number of Students}\\ \text{150-154}& \text{4}\\ \text{155-159}& \text{3}\\ \text{160-164}& \text{2}\\ \text{165-169}& \text{1}\\ \text{170-174}& \text{2}\\ \text{175-179}& \text{2}\\ \text{180-184}& \text{4}\\ \text{185-189}& \text{2}\\ \text{Total}& \text{20}\end{array}$

Number of students above the height of 169 = 2+2+4+2=10

$$\begin{array}{cc}ScientistName& Frequency\\ Hawking& 1\\ Einstein& 4\\ Newton& 1\\ Tesla& 3\\ Faraday& 2\end{array}$$          

From the above frequnecy table, we find that the maximum frequency is 4 which corresponds to Einstein.

Hence, Einstein is the name whose frequency is the highest.

Data available to us in an unorganised form is called raw data.

2 bags comprise Rs 300 so 1 will comprise Rs 150

$\text{And half bag will have}\frac{150}{2}=Rs.75$

So, 2 bags and a half comprise 300 + 75 = Rs 375

Line graphs are the most favoured graphs in the school as it has the highest value on the Y-axis of 9.Frequency polygon is the least favoured as it has the smallest value of just 1. 

The total area of the pie chart (gilrs and boys) = 100%

The white region is the percentage of girls = 100% – percentage of boys

100% -75%  = 25 %

The percentage of the girls in the class is 25%