2
3
4
5
6
Correct answer is E
14 of the letters of the alphabet do not appear as the first letter of surname
∴ the no. of letters that appeared = 26-14 = 12 alphabets
15 surnames begin with 10 letters beside O and A
∴ 6 surnames begin with a letter
5/8
7/8
9/16
14/25
39/40
Correct answer is A
No. of possible outcome = 40
No. of expected outcome = 16 + 9 = 25
Probability = 25/40 = 5/8
If Q = (all perfect squares less than 30) and P = (all odd numbers from 1 to 10). Find Q ∩ P.
(1, 4, 9, 16, 25)
(1, 3, 4, 5, 7, 9, 16, 25)
(1, 3, 5, 7, 9)
(1, 9)
Φ
Correct answer is D
Q = {1, 4, 9, 16, 25} P = { 1, 3, 5, 7, 9}
Q ∩ P = { 1, 9}
391km
503km
782km
1006km
2012km
Correct answer is C
135o
105o
90o
75o
60o
Correct answer is D
\(\Delta RPS\) = Isosceles triangle
\(\therefore < RPS = \frac{180° - 90°}{2}\)
= 45°
In \(\Delta QPR\),\(\sin < QPR = \frac{1}{2}\)
= 30°
\(\therefore < QPS = 30° + 45° = 75°\)
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