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- The table below shows the distribution of marks scored by 100 candidates in an examination.(Solved)
The table below shows the distribution of marks scored by 100 candidates in an examination.
a) Find k.
b) Using an assumed mean of 44.5 calculate.
i) The mean
ii) The standard deviation.
c) Calculate the median
Date posted: May 8, 2019. Answers (1)
- The football team in school decided to raise shs 3600 for a party. Each student was to contribute the same amount.
However before the contributions were...(Solved)
The football team in school decided to raise shs 3600 for a party. Each student was to contribute the same amount.
However before the contributions were made five members of the football team decided to transfer to other schools.
This meant that the remaining contributors had to pay more to meet the same target.
a) If the increase in contribution per student was shs 24. Taking the original number of footballers to be n
i) Give an expression for the initial amount that each should have contributed.
ii) Give an expression for the contribution after the transfer.
iii) Form an equation hence find the number of members in the football team originally
b) Calculate the percentage increase in the contribution per student caused by the transfer.
Date posted: May 8, 2019. Answers (1)
- The figure below shows a sketch of a plot of land showing the baseline XY =300m and offsets drawn against it. If all
measurements are in...(Solved)
The figure below shows a sketch of a plot of land showing the baseline XY =300m and offsets drawn against it. If all
measurements are in metres. Transfer the information on the sketch to field book (all measurements are in metres.
Date posted: May 8, 2019. Answers (1)
- Given the vectors a = 6i + 8j,b = 3i - 9j and c = 4i + j
Find the value of h and k such...(Solved)
Given the vectors a = 6i + 8j,b = 3i - 9j and c = 4i + j
Find the value of h and k such that ha + kb = c.
Date posted: May 8, 2019. Answers (1)
- A flower garden is in the form of the trapezium shown below. Find the area of the garden in m²(Solved)
A flower garden is in the form of the trapezium shown below. Find the area of the garden in m²
Date posted: May 8, 2019. Answers (1)
- The diagram below shows an open cuboid. Find the distance between points C and X on the surface of the net if t he
cuboids is...(Solved)
The diagram below shows an open cuboid. Find the distance between points C and X on the surface of the net if t he
cuboids is opened up into a net by cutting along BC, HF, GE and AD given the GX is 6cm.
Date posted: May 8, 2019. Answers (1)
- Find the equation of a line passing through (2, -3) and is perpendicular to the line 4y - 6x + 5 = 0(Solved)
Find the equation of a line passing through (2, -3) and is perpendicular to the line 4y - 6x + 5 = 0
Date posted: May 8, 2019. Answers (1)
- Working together two taps A and B can fill a tank in 6 hours. By itself tap A can fill the tank in 8 hrs.(Solved)
Working together two taps A and B can fill a tank in 6 hours. By itself tap A can fill the tank in 8 hrs.
a) How long can tap B take to fill the tank by itself.
b) Tap A and B are opened at the same time and after running for 2 hours, an outlet tap which can drain the full tank
by itself in 12 hours is opened. How much longer will it take the tank to be filled.
Date posted: May 8, 2019. Answers (1)
- Use reciprocal and square root tables to evaluate to 4 significant figures, the expression.(Solved)
Use reciprocal and square root tables to evaluate to 4 significant figures, the expression.
Date posted: May 8, 2019. Answers (1)
- A translation T maps P(5, 3) onto P1(2, -5). Find the length of P1R1if point R1 is the image of
R(-2, -3) under the same translation...(Solved)
A translation T maps P(5, 3) onto P1(2, -5). Find the length of P1R1if point R1 is the image of
R(-2, -3) under the same translation T.
Date posted: May 8, 2019. Answers (1)
- Half of the interior angles of an irregular hexagon are in the ratio 2 : 3 : 4, while the other half are in the...(Solved)
Half of the interior angles of an irregular hexagon are in the ratio 2 : 3 : 4, while the other half are in the ratio 4 : 3 : 5 .
List the interior angles of the hexagon.
Date posted: May 8, 2019. Answers (1)
- Solve the simultaneous equations:(Solved)
Solve the simultaneous equations:
Date posted: May 8, 2019. Answers (1)
- A trader imported a camera for which she paid import duty at 40% of the purchase price. She later sold it to a
customer giving 8%...(Solved)
A trader imported a camera for which she paid import duty at 40% of the purchase price. She later sold it to a
customer giving 8% discount. If the customer paid shs 18,032 for the camera, find the purchase price.
Date posted: May 8, 2019. Answers (1)
- Solve for b in the equation(Solved)
Solve for b in the equation
Date posted: May 8, 2019. Answers (1)
- Without using calculators of mathematical tables, find the value of(Solved)
Without using calculators of mathematical tables, find the value of
Date posted: May 8, 2019. Answers (1)
- When a certain number is divided by 30, 45 or 54, there is always a remainder of 21. Find the least number(Solved)
When a certain number is divided by 30, 45 or 54, there is always a remainder of 21. Find the least number
Date posted: May 8, 2019. Answers (1)
- Evaluate the following expression(Solved)
Evaluate the following expression.
Date posted: May 8, 2019. Answers (1)
- Two fair dice are tossed once. The event A and B are defined as follows:
A: the score on the two dices are the same
B: at...(Solved)
Two fair dice are tossed once. The event A and B are defined as follows:
A: the score on the two dices are the same
B: at least one die shows a 4.
(a) Draw a probability space representing the tossing.
(b) Calculate:
(i) The probability of even A
(ii) The probability of even B
(iii) The probability of even A and B
(c) If the two dice are tossed three time
(i) Draw a tree diagram showing the event A happening for the three tosses.
(ii) Calculate the probability that A occurs:
(a) Exactly once
(b) At least once
(c) At most once
Date posted: May 8, 2019. Answers (1)
- A particle moving with acceleration a = (10 –t) m/s2. When t = 1 velocity V = 2 m/s and when t = 0 displacement...(Solved)
A particle moving with acceleration a = (10 –t) m/s2. When t = 1 velocity V = 2 m/s and when t = 0 displacement S =
OM.
(a) Express displacement and velocity in terms of t.
(b) Calculate the velocity when t = 35
(c) What is the displacement when t = 5
(d) Calculate maximum velocity.
Date posted: May 8, 2019. Answers (1)
- A mobile dealer sells phones of two types: Nokia and Motorola. The price of one nokia and one Motorola phone is Ksh
2000 and Ksh 16000...(Solved)
A mobile dealer sells phones of two types: Nokia and Motorola. The price of one nokia and one Motorola phone is Ksh
2000 and Ksh 16000 respectively. The dealers wishes to have al least fifty mobile phones. The number of Nokia
phones should be at least the same as those of Motorola phones. He has Ksh 120,000 to spend on phones. If he
purchases x Nokia phones and y Motorola phones;
(a) Write down all the inequalities to represent the above information.
(b) Represent the inequalities in part (a) above on the grid provided.
(c) The profit on a nokia phone is Ksh 200 and that on a Motorola phone is Ksh 300. Find the number of phones of
each type he should stock so as to maximize profit.
Date posted: May 8, 2019. Answers (1)