Mathematics (2018) | Study Mode

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Question 11
A
\(\frac{b(a + 1 - x)}{a + 1}\)
B
\(\frac{a + 1}{b(a - x + 1)}\)
C
\(\frac{a(b - x + 1)}{b + 1}\)
D
\(\frac{b}{a(b - x + 1)}\)
Explanation

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Correct option: A
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Question 12
A
0.040
B
0.049
C
0.050
D
0.49
Explanation

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Correct option: C
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Question 13
A
026
B
045
C
210
D
240
Explanation

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Correct option: D
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Question 14
A
\(\frac {1}{10}\)
B
\(\frac {2}{10}\)
C
\(\frac {9}{20}\)
D
\(\frac {11}{20}\)
Explanation

Pr(both John and James passed)

= \(\frac {3}{4}\) x \(\frac {3}{5}\)

= \(\frac {9}{20}\)

Pr(john and james failed)= 1- Pr(john and james passed)

= 1 \(\frac {9}{20}\)

= \(\frac {11}{20}\)

Answer is D


Correct option: D
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Question 15
A
14.67cm
B
42.67cm
C
101.33cm
D
513.33cm
Explanation

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Correct option: C
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Question 16
A
25
B
\(\frac{1}{5}\)
C
1
D
\(\frac{1}{25}\)
Explanation

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Correct option: B
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Question 17
A
\(\frac{9}{10000}\)
B
\(\frac{9}{1000}\)
C
\(\frac{9}{100}\)
D
\(\frac{9}{10}\)
Explanation

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Correct option: B
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Question 18
A
N676.50
B
N820
C
N1,640
D
N4,920
Explanation

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Correct option: C
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Question 19
A
N16,200
B
N14,200
C
N12,000
D
N8,000
Explanation

Since it depreciates by 10% At the end of first year, its value = 90% of 20000

= \(\frac{90}{100}\) x 20000 =18000

At the end of second year, its value = 90% of 18000

= \(\frac{90}{100}\) x 18000 = ?16,200

Answer is A


Correct option: A
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Question 20
A
1
B
2
C
3
D
4
Explanation

Total frequency = 1 + 2 + 7 + 5 + 4 + 3 = 22

Median is the middle number

= \(\frac{Nth}{2}\)

term = \(\frac{22th}{2}\) = 11th term

Going in ascending order, 11th term is 3, going in descending order 11th term is 3

Median = 3 + \(\frac{3}{2}\) = \(\frac{6}{2}\) = 3

Answer is C


Correct option: C

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