(2.6, 2.6)
(2.5, 2.6)
(2.6, 2.5)
(2.5, 2.1)
Correct answer is B
Arrange the numbers in order, 1.6, 2.1, 2.1| 2.4, 2.6| 2.6, 2.6, 3.7
n = median = \(\frac{2.4 + 2.6}{2}\)
= 2.5
m = mode = 2.6
∴ (n, m) = (2.5, 2.6)
35 years
40 years
42 years
54 years
Correct answer is C
Total age of the whole family = 21 x 14 = 294
Total age without the grandfather = 21 x 12 = 252
Age of grandfather = 294 - 252
= 42 years
30o
60o
112.5o
157.5o
Correct answer is D
Rice = 75g, Margarine = 40g, Meat = 105g, Bread = 20g, Total = 240
Angle of sector represented by meat
= \(\frac{105}{240}\) x \(\frac{360°}{1}\) = 157.5°
2\(\sqrt{5}\)
3
4
4\(\sqrt{3}\)
Correct answer is D
xz2 = 62 + 62
36 + 36 = 72
xz = \(\sqrt{72}\)
6\(\sqrt{2}\) = xT
\(\frac{6\sqrt{2}}{2}\) = \(\frac{3}{\sqrt{2}}\)
OT2 = 52 + (3\(\sqrt{2}\))2 = 25 + 18
OT = 4\(\sqrt{3}\)
440\(\pi\)cm3
1100\(\pi\)cm3
4400\(\pi\)cm3
1100\(\pi\)cm3
Correct answer is A
Volume of cylinder pip (V) = \(\pi\)h(R\(^2\) - r\(^2\))
= 100\(\pi\)(7.2\(^2\) - 2.8\(^2\))
= 100\(\pi\)(51.84 - 7.84)
= 100\(\pi\) x 44
= 440\(\pi\)cm\(^3\)