Apps. and Interpretation for IBDP Maths Ebook 1 | Página 386

Your Practice Set – Applications and Interpretation for IBDP Mathematics
Exercise 78
78.1 (a)
(b)
78.2 (a)
(b)
78.3 (a)
(b)
78.4 (a)
(b)
Exercise 79
1
6
10
13
1
5
7
20
1
7
14
19
1
7
9
10
79.1 (a) a�b�
0.5
(b) 3a�4b�
1.82
(c) a � 0.18 , b � 0.32
79.2 (a) a�b�
0.8
(b) 30a�40b�
26
(c) a � 0.6 , b � 0.2
79.3 (a) a � 0.4
(b) b � 0.3 and c � 0.2
(c) P( Y �50) � 0.12
79.4 (a) c � 0.3
(b) a � 0.1 and b � 0.2
(c) P( Y �36) � 0.04
Exercise 80
80.1 (a) (i) 0.36
(ii) 0.6
(b) (i) 0.16
(ii) 0.6
(c) Refer to solution
(d) 5.6
80.2 (a) (i) 0.06
(ii) 0.54
(b) (i) 0.48
(ii)
7
23
(c) Refer to solution
(d) 16.45
80.3 (a) (i)
7
20
(ii)
2
5
(b) (i)
1
20
(ii)
7
10
(c) Refer to solution
(d) $225
80.4 (a) (i) 0.2
(ii) 0.6
(b) (i) 0.1
(ii)
2
3
(c) Refer to solution
(d) $4.8
Exercise 81
81.1 (a) (i)
(b)
(ii)
(iii)
(i)
(ii)
1
9
1
6
3
10
13
18
12
13
376
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