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2. Look at the adjacent histogram and answer the
questions given below.
( a) How many students have height more than
or equal to 135 cm but less than 150 cm?
( b) Which class interval has the least number
of students?
( c) What is the class size?
( d) How many students have height less than
140 cm?
3. The following data represents the approximate
percentage of water in various oceans. Prepare
a pie chart for the given data.
l Pacific – 40%

l Atlantic – 30%
l Indian – 20%
l Others – 10%
4. Rani picks up a card from the given cards.

R Y Y R B B G Y R G

1 2 3 4 5 6 7 8 9 10

Calculate the probability of getting
( a) an odd number (b) a Y card (c) a G card (d) B card bearing number > 7

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MAths connect
All of us have some concept of statistics because magazines, newspapers, radio, and TV advertisements
are full of statistics or numerical data. The existence of the practice of collecting numerical data in ancient India
is evident from the fact that during the reign of Chandragupta Maurya, there was a good system of collecting
such data especially with regard to births and deaths. During Akbar’s reign, Raja Todarmal, the Land and Revenue
Minister, maintained good records of land and agricultural statistics. In Aini-Akbari, written by Abul Fazal, a
detailed account of the administrative and statistical surveys conducted during that period can be found.
From the paragraph given above, prepare
the frequency table of all the letters of the Letter Tally marks Frequency
English alphabet and answer the questions A
given below: B
(a) Which is the least frequently occurring
letter? C
(b) Which vowel is most commonly used? -
(c) Which consonant is most commonly
used? -
(d) Find the ratio of vowels to that of Z
consonants.

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