Page 394 - Start Up Mathematics_8 (Non CCE)

Answer in One Word or a Line yellow socks. Now, there will only be green socks left in the
1. II quadrant box. Thus, in the next two attempts, we will have a pair of
2. Percentage value of component green socks as well.
Hence, total number of attempts = 32 + 26 + 2 = 60
Central angle of component
= ¥ 100 Review Exercises
3. 0, 0 360° Multiple Choice Questions

Let’s Evaluate 1. c 2. a 3. c 4. d 5. a
2. (a) 500 Solve Mentally
(b) The number of employees are maximum in the group True or False
1,500–2,000 (`). 1. False 2. True 3. True 4. False 5. True
(c) The number of employees are minimum in the group
3,500–4,000 (`). Fill in the Blanks
(d) 34 (e) 54 (f) 4 1. trial 2. 1 3. 36 4.
5. (9, 6) — I Quadrant 5. compound event
(–3, –7) — III Quadrant Answer in One Word or a Line
(2, –4) — IV Quadrant 1. Probability is the study of the likelihood or chance of the
(–8, 5) — II Quadrant occurrence of a given event.
(3, –8) — IV Quadrant 2. An experiment in which all possible outcomes are known
Thinking Skills but the exact outcome cannot be predicted in advance is

1. (a) 45 seconds (b) Ranu before Manu known as random experiment.
(c) Manu (d) Ranu 3. A collection of all possible outcomes (or events) of a
random experiment is called sample space.
Values and Life Skills 4. 13 cards each
(a) Given pie chart gives the information about inmates in a
hostel and the languages spoken by them Let’s Evaluate
(b) Hindi (c) 90 (d) 198 (e) 3:2 1. P (doublet) = 8 and P (not doublet) = 59
Exemplar Problems 67 67

1. b 2. d 3. Origin 4. True 2. (a) 1 (c) 33 (c) 6
5. (a) Newspaper (b) Radio (c) 39% (d) 63% 2 100 25
9
n
m
l
(e) Internet, Webmedia (d) (Hint: If x is a number and x = a . b . c . ....,
100
Chapter 22 then number of factors of x = (n + 1)(m + 1) (l + 1) ....)
Exercise 3 9 3
3 3. (a) 10 (b) 20 (c) 4
1.
5 3
1 1 1 1 1 4.
2. (a) (b) (c) (d) (e) 5
4 4 4 2 2
Thinking Skills
1 1 15 5 2
3. (a) (b) (c) (d) (e)
4 2 36 6 9 8
1.
11
1 3 4 1
(f) 4. 5. 2. (Hint: Ordinary year has 365 days)
6 8 7 7
2 5 11 1 Values and Life Skills
6. (a) (b) (c) (d)
9 6 18 3 1 1 1 9 3
(a) (b) (c) (d) (e)
1 3 3 3 2 2 4 26 13
7. (a) (b) (c) (d)
10 10 8 40 (f) 1 (g) 4
Quiz 52 13
Let’s consider the worst case: In the first 32 attempts, we get Exemplar Problems
all the red socks and in the next 26 attempts, we get all the 1. b 2. b 3. random 4. True 5. 28
386