Find the lower quartile of the distribution illustrated by the cumulative frequency curve
17.5
19.0
27.5
28.0
Correct answer is B
Lower quartile,
Q1 = \(\frac{1}{4}\)Nth term
= \(\frac{1}{4}\) x 600th term
= 150th term
= 15.5 + 3 + 0.5
= 19
Find the next three terms of the sequence; 0, 1, 1, 2, 3, 5, 8...
13, 19, 23
9, 11, 13
11, 15, 19
13, 21, 34
Correct answer is D
No explanation has been provided for this answer.
The relation y = x2 + 2x + k passes through the point (2,0). Find the value of k
- 8
- 4
4
8
Correct answer is A
Y = x2 + 2x + k (given)
y = o when x = 2
thus 0 = 22 + 2 x 2 + k
0 = 4 + 4 + k
given k = -8
\(\frac{2}{9}\)
\(\frac{5}{18}\)
\(\frac{20}{81}\)
\(\frac{5}{9}\)
Correct answer is C
n(red balls) = 5
n(blue balls) = 4
n(\(\iff\)) = 9
Hence, prob (R1, B2)
= \(\frac{5}{9} \times \frac{4}{9}\)
= \(\frac{20}{81}\)
In the diagram, O is the centre of the circle, < QPS = 100o, < PSQ = 60o and < QSR. Calculate < SQR
20o
40o
60o
80o
Correct answer is A
In the diagram, < RPQ = 80o(angles in same segment)
< SPR = 100o - < RPQ
= 100 - 80
= 20o
< SQR = < SPR = 20o (same reason as above)
< SQR = 20o
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