Page 123 - Ganit Kaushal

Sol. Let us prepare a table using tally marks:

Fruits Names A O B M G
No. of students 9 7 8 10 8
Two fruits which are liked by an equal number of students are Banana (B) and Grapes (G).

So, option (d) is correct.
Ex 5. According to the data of example 4, which fruit is liked by the most students?
(a) O (b) G (c) M (d) A
Sol. The fruit which is liked by the most students is Mango (M).
So, option (c) is correct.
Ex 6. Fill in the blanks.
(a) A __________ is a collection of numbers gathered to give some meaningful information.
(b) The data can be arranged in a tabular form using __________ marks.
(c) A __________ represents data through pictures of objects.
(d) In a bar graph __________ can be drawn horizontally or vertically.
(e) In a bar graph, bars of __________ width can be drawn horizontally or vertically with __________
spacing between them.
(f) An observation occurring seven times in a data set is represented as __________ using tally marks.
(g) In a pictograph, if a symbol  represents 20 flowers in a basket, then  stands for __________
flowers.
Sol. (a) data (b) tally (c) pictograph (d) bars
(e) uniform; equal (f) || (g) 60
Ex 7. State whether the given statements are True (T) or False (F).
(a) In a bar graph, the width of bars may be unequal.
(b) In a bar graph, the bars of uniform width are drawn vertically only.
(c) In a bar graph, the gap between two consecutive bars may not be the same.
(d) In a bar graph, each bar (rectangle) represents only one value of the numerical data.

(e) To represent the population of different towns using a bar graph, it is convenient to take one unit
length to represent one person.
(f) Pictographs and bar graphs are pictorial representations of the numerical data.
(g) An observation occurring five times in a data set is recorded as ||||, using tally marks.

(h) In a pictograph, if the symbol represents 50 books in a library shelf, then the symbol
represents 25 books.
Sol. (a) In a bar graph, all bars should have equal width. So, the given statement is false.
(b) In a bar graph, the bars can be drawn both vertically and horizontally. So, the given statement is
false.
(c) The gap between consecutive bars in a bar graph should be uniform to maintain clarity. So, the
given statement is false.
(d) True

(e) Populations are usually large numbers, so representation of one unit length to one person is
impractical. Thus, the given statement is false.
(f) True

Data Handling and Presentation 121