- The probability of three dart players Githongo, Mwai and Kanyoro hitting the bulls eye in a competition are 0.4, 0.7
and 0.5 respectively.(Solved)
The probability of three dart players Githongo, Mwai and Kanyoro hitting the bulls eye in a competition are 0.4, 0.7
and 0.5 respectively.
a) Draw a probability tree diagrams to show the possible outcomes.
b) Find the probability that
i) all hit the bulls eye.
ii) only one of them hit the bulls eye.
iii) atmost one missed the bulls eye.
Date posted: May 3, 2019. Answers (1)
- A company is to construct a parking bay whose area is 135m2. It is to be covered with a concrete slab of uniform
thickness of 150mm....(Solved)
A company is to construct a parking bay whose area is 135m2. It is to be covered with a concrete slab of uniform
thickness of 150mm. To make the slab, cement, ballast and sand are to be mixed so that their masses are in the ratio 1 :4 : 4. The mass of 1m3 of dry slab is 2500kg. Calculate
a) i) the volume of the slab.
ii) the mass of the dry slab.
iii) the mass of cement to be used.
b) If one bag of cement is 50kg, find the number of bags to be purchased.
c) If a lorry carries 7 tonnes of sand, calculate the number of lorries of sand to be purchased.
Date posted: May 3, 2019. Answers (1)
- Mr. Kamau borrowed some money at 8% simple interest p.a. He borrowed the same amount and again repaid at the
end of the year. If Kamau...(Solved)
Mr. Kamau borrowed some money at 8% simple interest p.a. He borrowed the same amount and again repaid at the
end of the year. If Kamau paid interest of Ksh. 2500 and ksh. 4000 respectively for each year, calculate
a) The value of r
b) The amount borrowed per year.
Date posted: May 3, 2019. Answers (1)
- Two quantities A and B are such that B varies directly as square of A. When A is increased by 20%, what percentage
increase in B.(Solved)
Two quantities A and B are such that B varies directly as square of A. When A is increased by 20%, what percentage
increase in B.
Date posted: May 3, 2019. Answers (1)
- Use method of completing of square leaving your answer in a simplified surds x2 = 7x - 2(Solved)
Use method of completing of square leaving your answer in a simplified surds x2 = 7x - 2
Date posted: May 3, 2019. Answers (1)
- Given matrices A and C as follows;(Solved)
Given matrices A and C as follows;
Find a matrix B so that BA = c
Date posted: May 3, 2019. Answers (1)
- Find the value of x in the equation 10Cos2x - 7sinx + 2 = 0 for domain 00= x = 3600.(Solved)
Find the value of x in the equation 10Cos2x - 7sinx + 2 = 0 for domain 00≤ x ≤ 3600.
Date posted: May 3, 2019. Answers (1)
- Simplify the following expression as far as possible.(Solved)
Simplify the following expression as far as possible.
Hence or otherwise simplified
Date posted: May 3, 2019. Answers (1)
- The vectors a = (2x - 4)i + (x - 3)j + (x - 2)k and the length of /a/ = 7. Find two possible...(Solved)
The vectors a = (2x - 4)i + (x - 3)j + (x - 2)k and the length of /a/ = 7. Find two possible values of x.
Date posted: May 3, 2019. Answers (1)
- Given that (x - 2) is a factor of 3x2 + kx - 2 find the value of k and hence the other factor.(Solved)
Given that (x - 2) is a factor of 3x2 + kx - 2 find the value of k and hence the other factor.
Date posted: May 3, 2019. Answers (1)
- a) Expand and simplified the first four terms of the binomial expression (2 - 3x)6.(Solved)
a) Expand and simplified the first four terms of the binomial expression (2 - 3x)6.
b) Use the simplified expression in (a) above to estimate the value of (1.97)6 correct 5 decimal places.
Date posted: May 3, 2019. Answers (1)
- Two values X and Y are such that
3.5 < x < 4.9
0.03 < y < 0.27
What is the greatest possible value of x2/y(Solved)
Two values X and Y are such that
3.5 ≤ x ≤ 4.9
0.03 ≤ y ≤ 0.27
What is the greatest possible value of x2/y
Date posted: May 3, 2019. Answers (1)
- The equation of a circle is x2 - 8x + y2 + 12y = 12. Determine the centre and its radius of the circle.(Solved)
The equation of a circle is x2 - 8x + y2 + 12y = 12. Determine the centre and its radius of the circle.
Date posted: May 3, 2019. Answers (1)
- In the figure below XY is a tangent to a circle at YZ.VZ is a chord which produced to meet XY at Y. Given that...(Solved)
In the figure below XY is a tangent to a circle at YZ.VZ is a chord which produced to meet XY at Y. Given that XY = 9cm
and YZ = 6cm. Calculate the length of VZ.
Date posted: May 3, 2019. Answers (1)
- Without using mathematical tables evaluate,(Solved)
Without using mathematical tables evaluate,
Date posted: May 3, 2019. Answers (1)
- Make y the subject of the formula.(Solved)
Make y the subject of the formula.
Date posted: May 3, 2019. Answers (1)
- Use logarithms to evaluate.(Solved)
Use logarithms to evaluate.
Date posted: May 3, 2019. Answers (1)
- The distance S metres from a fixed point, covered by a particle t seconds is given by the equation.
s = t3 - 6t2 + 9t...(Solved)
The distance S metres from a fixed point, covered by a particle t seconds is given by the equation.
s = t3 - 6t2 + 9t + 5.
a) Calculate the gradient of the curve at t = 0.5 seconds.
b) Determine the value of s at the maximum turning point of the curve.
Date posted: May 3, 2019. Answers (1)
- A bus left town A at 11.45 a.m and travelled towards town B at average speed of 60km/h. A car left town B at 1.15p.m
on...(Solved)
A bus left town A at 11.45 a.m and travelled towards town B at average speed of 60km/h. A car left town B at 1.15p.m
on the same day and travelled towards town A along the same road at an average speed of 90km/h. The distance
between the two towns is 540km. Determine
a) The time of day when the two vehicles met.
b) How far from A they met.
c) How far outside town B the bus was when the car reached town A.
Date posted: May 3, 2019. Answers (1)
- The table below shows Kenya’s tax rates in a certain year.(Solved)
The table below shows Kenya’s tax rates in a certain year.
In that year Mr. Mwangi earned a basic salary of Kshs. 16000 per month. He is entitled to a house allowance of ksh.12000 per month and a medical allowance of ksh. 2000 per month.Calculate:
a) i) His taxable income per year in pounds.
ii) His monthly gross tax.
iii) The monthly net tax if he is given a relief of ksh. 1056 per month.
b) Other deductions per month are as follows
N.H.I.F sh. 320, cooperative loan sh. 5600,
WCPS sh 488, coop shares sh 2000
Find his monthly net pay.
Date posted: May 3, 2019. Answers (1)