21) In the sequence 18, a, 14, 32, the common difference is:
22) If x < 0 and y > 0, then the point P(x, y) is in which quadrant?
A) First Quadrant
B) Second Quadrant
C) Third Quadrant
D) Fourth Quadrant
23) What is the value of \( \csc 31^\circ \sec 59^\circ \)?
A) '0'
B) 1
C) Undefined
D) 2
24) If a, b, c are in A.P., then \( \frac{a – b}{b – c} \) is equal to:
A) 1
B) 2
C) '0'
D) Undefined
25) If a, b, c are in A.P., then \( \frac{a – b}{b – c} \) is equal to:
A) 1
B) 2
C) '0'
D) Undefined
26) If \( A = \{1, 2, 3, 4, 5\} \) and \( B = \{1, 3, 5, 7\} \), then \( n(A \cap B) = \dots \):
27) The zeroes of the quadratic polynomial \( x^2 + x – 2 \) are:
A) -2, 1
B) -1, 2
C) 1, 2
D) -1, -2
28) Which of the following statement regarding the probability of an event is correct?
A) Probability of an event is always negative
B) Probability of an event is always between 0 and 1
C) Probability of an event is always greater than 1
D) Probability of an event is always greater than 0
29) What is the probability of getting a number 7 in a single throw of a dice?
A) \( 0 \)
B) \( \frac{1}{8} \)
C) \( \frac{1}{12} \)
D) \( \frac{1}{36} \)
30) If one card is selected from a well-shuffled deck of 52 cards, then the probability of getting an ace card is:
A) \( \frac{4}{52} \)
B) \( \frac{1}{13} \)
C) \( \frac{1}{52} \)
D) \( \frac{4}{13} \)
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