According to the bar graph, we get to know that a girl whose age is 10 years has a height of 60 inches, if the age is 15 years then the height is 65 inches and lastly if the age is 20 years then the height is 66 inches. Hence the height of the 15 year old girl is 65 inches.

Total hours(as per the pie chart)= 12 + 2 + 2 + 8 = 24 hours
Total number of hours spent in the gym = 2 hours
The proportion of time spent in gym
$=\frac{\text{hours spent in the gym}}{\text{total number of hours}}=\frac{2}{24}=\frac{1}{12}$

A bar graph is shown in the figure above. As you can see the height of the rectangle gives us the frequency of the object the bar is representing. The width does not represent any quantity. Thus statement 1 is true while statement 2 is false.

Bar graph is a graph of rectangles where the height of the bar gives us the quantity we are interested in. Thus, the figure above represents a bar graph.

According to the pie chart, sulphur dioxide has the highest content which is 50%. Carbon dioxide has 25%. Nitrogen and oxygen combined together have 25% content according to the pie chart. Therefore, when we arrange them in the decreasing order the first gas that we get is sulphur dioxide and the second one is carbon dioxide.

Total expenditure is:
4000 + 2000 + 1500 + 1500 + 1000 = 10,000
Central angle of clothing is
$=\frac{\text{expenditure on clothing}}{\text{total expenditure}}$
$=(\frac{2000}{10000}\times {360}^{\circ })={72}^{\circ }$

Number of aces =  4

Total number of cards = 52

Probability of getting an ace
$=\frac{\text{No. of aces}}{\text{Total no. of cards}}$
$=\frac{4}{52}$
$=\frac{1}{13}$

$\text{Probability}=\frac{\text{no. of favorable outcomes}}{\text{total no. of outcomes}}$
Therefore, the probability of getting a blue ball $=\frac{2}{5}$

While the probability of getting a black ball $=\frac{1}{5}$
Also, the probabiltiy of getting a green ball $=\frac{1}{5}$

So the events are not equally likely.

If a die is thrown then the outcomes which are multiple of 3 are 3 and 6.

So the probability of getting 3 and 6 
$=\frac{\text{Outcomes of interest}}{\text{Total number of outcomes}}$
 $=\frac{2}{6}$ = $\frac{1}{3}$