Page 323 - Start Up Mathematics_7

Section C

3. Fill in the blanks: 1 M × 5 = 5 M
(a) The Indian flag has __________ lines of symmetry.
(b) 1 hectare is equal to __________ m .
2
(c) A cube has __________ diagonals.

(d) The value which occurs the maximum number of times in a data is called the __________.
(e) If a letter is selected at random from the word “MOVIE”, the probability of selecting a vowel is _____.

Section D

4. Give one word or sentence for the following: 1 M × 5 = 5 M
(a) Identify the solid formed by folding the adjoining
net.
(b) How do we calculate the mean of data containing observations x , x , x , ..., x with corresponding
2
3
n
1
frequencies f , f , f , ..., f ?
1 2 3 n
(c) What cross-section is made by cutting a cylinder vertically?
(d) What is the range of the data 3, 7, 8, 12, 15, 25, 14 and 7?
(e) What is the likelihood of occurrence of an event with probability 0.7?

Section E

5. Find the perimeter of the shaded region as shown in the figure given below. 2 M

8 cm
10 cm 4 cm

10 cm 3 cm
6. The marks scored by 10 students are as follows: 3 M

24, 14, 29, 21, 19, 11, 19, 25, 24, x
If the mean is 20, find x.

Project Work

Visualizing Solid Shapes

Using cubes make a figure whose three views are given below:

Front view Side view Top view

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