Q. The marked price of a radio is Rs. 480 and the rate of discount is 15%. The amount of discount is -
1) Rs.65
2) Rs.60
3) Rs.75
4) Rs. 72
Q. The selling price of 1.0 articles is equal to the cost price of 8 articles. The loss percentage is -
1) 30
2) 15
3) 20
4) 25
Q. Two numbers are in the ratio 5 : 6 If 7 is added to both numbers, their ratio becomes 6 :7. The original numbers are -
1) 35, 42
2) 15, 18
3) 20, 24
4) 25, 30
Q. If the cardinality of a set A is 4 and that of a set B is 3, then what is the cardinality of the set A △ B?
1) 1
2) 5
3) 7
4) Cannot be determined as the sets A and B are not given
Q. The distributions X and Y with the total number of observations 36 and 64, and mean 4 and 3 respectively are combined. What is the mean of the resulting distribution X + Y?
1) 3.26
2) 3.32
3) 3.36
4) 3.42
Q. A lot of 4 white and 4 red balls are randomly divided into two halves. What is the probability that there will be 2 red and 2 white balls in each half?
1) 18/35
2) 3/35
3) 1/2
4) None of the above
Q. A point P moves such that the difference of its distances from two given points (c, 0) and (- c, 0) is constant. What is the locus of point P?
1) Circle
2) Ellipse
3) Hyperbola
4) Parabola
Q. A square is drawn by joining midpoints of the sides of a square. Another square is drawn inside the second square in the same way and the process is continued indefinitely. If the side of the first square is 16 cm, then what is the sum of the areas of all the squares?
1) 256 sq .cm
2) 512 sq .cm
3) 1024 sq .cm
4) 512 / 3 sq .cm
Q. What is the sum of all the coefficients in the expansion of (1 + x)n?
1) 2n
2) 2n -1
3) 2n-1
4) 2(n-1)
Q. If α and β are the roots of the equation x2 - 2x + 4 = 0, then what is the value of α3 + α3?
1) 16
2) -16
3) 8
4) -8
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