Given that Z = {1,2,4,5} what is the power of set Z?
16
8
10
12
Correct answer is A
Z has 4 elements, power = number of subset = 2p
Z = 2n = 24
= 16
1/2
1/3
2/5
3/4
Correct answer is B
Prob.(A outcome) = \(\frac{1}{6}\), Prob.(B outcome) = ¼
P(A ∪ B) = 1/12, Prob.(A ∩ B)
Prob.(A ∩ B) = Prob.(A) + Prob.(B) − Prob.(A ∪ B)
1/6 + 1/4 − 1/12
= (2 + 3 − 1) ÷ 12
= 4/12
= 1/3
Prob.(A ∩ B) = 1/3
The volume of a cone (s) of height 6cm and base radius 5cm is
157cm3
155cm3
175cm3
145cm3
Correct answer is A
V = ⅓ πr2 h
Volume of a cone (Vc) = ⅓ × 3.14 × (5)2 × 6
= 156.93
157cm3
10.5cm
5cm
10cm
3cm
Correct answer is D
No explanation has been provided for this answer.
The area of a circle of radius 4cm is equal to (Take π = 3.142 )
10.3cm2
15.7cm2
50.3cm2
17.4cm2
Correct answer is C
Area of a circle (A) = πr2
Radius = 4cm
π = 3.142
A = 3.142 × (4)2
= 3.142 × 16
= 50.272
A = 50.3cm2 (1dp)