Mathematics (2018) | Study Mode

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Question 1
A
x < 8
B
x > -6
C
x < 4
D
x > -3
Explanation

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Correct option: B
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Question 2
A
x < 8
B
x > -6
C
x < 4
D
x > -3
Explanation

Explanation not provided, please join discuss, your contributions are welcomed


Correct option: B
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Question 3
Mathematics (2018) Q 3 image
A
65
MATHEMATICS A 9 image
B
23
MATHEMATICS B 9 image
C
17
MATHEMATICS C 9 image
D
91
MATHEMATICS D 9 image
Explanation

Explanation not provided, please join discuss, your contributions are welcomed


Correct option: C
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Question 4
A
\(\frac{5}{8}\)
B
\(\frac{5}{16}\)
C
\(\frac{1}{2}\)
D
\(\frac{3}{8}\)
Explanation

Each multiplication of elements gives 16 results out of which the ones that are not greater than 6 are asterisked (*) and they are 8 in numbers

Pr(product of x and y NOT > 6 ) = \(\frac{8}{16}\) = \(\frac{1}{2}\)


Correct option: D
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Question 5
A
1000
B
2000
C
3000
D
4000
Explanation

Explanation not provided, please join discuss, your contributions are welcomed


Correct option: B
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Question 6
A
8
B
\(\frac{1}{8}\)
C
1\(\frac{1}{8}\)
D
\(\frac{2}{5}\)
Explanation

Explanation not provided, please join discuss, your contributions are welcomed


Correct option: B
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Question 7
A
7
B
6
C
5
D
4
Explanation

Profit (P) = 10\(_x\) \(_x\)2

Maximum profit can be achieved when the differential of profit with respect to number of bags(x) is 0

i.e. \(\frac{dp}{dx}\) = 0

\(\frac{dp}{dx}\) = 10 - 2x = 0

10 = 2x

Then x = \(\frac{10}{2}\) = 5

Answer is C


Correct option: C
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Question 8
Mathematics (2018) Q 8 image
A
10
MATHEMATICS A 9 image
B
28
MATHEMATICS B 9 image
C
36
MATHEMATICS C 9 image
D
40
MATHEMATICS D 9 image
Explanation

The diagram shows angles at a point, the total angle at a point is 360

x - 10 + 4x - 50 + 2x + 3x + 20 = 360

10x - 40 = 360

10x = 360 + 40

10x = 400

x = \(\frac{400}{10}\)

x = 40


Correct option: D
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Question 9
A
\(\frac{9}{13}\)
B
\(\frac{7}{13}\)
C
5
D
9\(\frac{3}{5}\)
Explanation

\(\frac{3}{4}\) t + \(\frac{1}{3}\) (21 - t) = 11

Multiply through by the LCM of 4 and 3 which is 12

12 x(\(\frac{3}{4}\) t) + 12 x (\(\frac{1}{3}\) (21 - t)) = (11 x 12)

9t + 4(21 - t) = 132

9t + 84 - 4t = 132

5t + 84 = 132

5t = 132 - 84 = 48

t = \(\frac{48}{5}\)

t = 9 \(\frac{3}{5}\)

Answer is D


Correct option: D
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Question 10
A
\(\frac{5}{6}\)
B
\(\frac{7}{12}\)
C
\(\frac{5}{12}\)
D
\(\frac{1}{6}\)
Explanation

Explanation not provided, please join discuss, your contributions are welcomed


Correct option: C

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