In a class of 30 students, the marks scored in an examination are displayed in the histogram. What percentage of the student scored more than 40%?
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1989
If PST is a straight line and PQ = QS = SR in the diagram, find y.
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1989
In the diagram, HK is parallel to QR, PH = 4cm and HQ = 3cm. What is the ratio of KR:PR?
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1989
On the curve, the points at which the gradient of the curve is equal to zero are
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1989
If n is the median and m is the mode of the following set of numbers, 2.4, 2.1, 1.6, 2.6, 2.6, 3.7, 2.1, 2.6, then (n, m) is
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1989
In a family of 21 people, the average age is 14years. If the age of the grandfather is not counted, the average age drops to 12 years. What is the age of the grandfather?
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1989
In preparing rice cutlets, a cook used 75g of rice, 40g of margarine, 105g of meat and 20g of bread crumbs. Find the angle of the sector which represents meat in pie chart
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1989
OXYZW is a pyramid with a square base such that OX = OY= OZ = OW = 5cm and XY = XW = YZ = WZ = 6cm. Find the height OT
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1989
A square tile has side 30cm. How many of these tiles will cover a rectangular floor of length 7.2m and width 4.2?
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1989
4sin2 x - 3 = 0, find x if 0 \(\geq\) x \(\geq\) 90o
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1989
The pilot of an aeroplane, flying 10km above the ground in the direction of a landmark, views the landmark to have angles of depression of 35o and 55o. Find the distance between the two points of observation
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1989
if x : y = 5 : 12 and z = 52cm, find the perimeter of the triangle
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1989
In xyz, y = z = 30o ans XZ = 3cm. Find YZ
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1989
PQRS is a rhombus. If PR2 + QS2 = KPQ2, determine k
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1989
A rectangular polygon of (2k + 1) sides has 140o as the size of each interior angle. Find k
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1989
If -8, m, n, 19 are in arithmetic progression, find (m, n)
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1989
The sum of the first two terms of a geometric progression is x and sum of the last terms is y. If there are n terms in all, then the common ratio is
Express \(\frac{1}{x + 1}\) - \(\frac{1}{x - 2}\) as a single algebraic fraction
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1989
find the range of values of values of r which satisfies the following inequality, where a, b and c are positive \(\frac{r}{a}\) + \(\frac{r}{b}\) + \(\frac{r}{c}\) > 1