THE TABLE BELOW SHOWS THE NUMBER OF STUDENTS IN EACH CLASS IN A SCHOOL. THE PERCENTAGE (%) OF THE STUDENTS IN EACH CLASS WHO WEAR GLASSES IN ALSO SHOWN.

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 24

In the figure below A, B, C and D are points on the circumference of the circle, centre O. A tangent to the circle at A intersects chord CD produced at E. Line AB is parallel to line EC. Angle AED = 45 degrees and angle ABD = 40 degrees.

​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 23

The systolic blood pressure of 60 patients attending a clinic was recorded as follows:

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 22

​A road contractor has to transport 240 tonnes of hardcore. He will use two types of lorries, type A and type B. He has 3 type A lorries and 2 type B lorries. The capacity of each type A lorry is 8 tonnes while that of type B is 15 tonnes. All type A lorries must each make the same number of trips. Similarly all type B lorries must each make the same number of trips. The number of trips made by each type B lorry should be less than twice those made by each type A lorry. Each type A lorry must not make more than 6 trips.

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 21

An aircraft took off from point A (x degrees North, 15 degrees east) at 0720h, local time. It flew due west to another point B (x degrees North, 75 degrees West) a distance of 5005 km from A.

​​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 20

Kering purchased (2x-1) identical pens for Ksh 180. Naraya purchased (3x+1) identical pencils for Ksh 200.

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 19

THE TABLE BELOW SHOES THE INCOME TAX RATES FOR A CERTAIN YEAR

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 18

​A FARMER HAS TWO TRACTORS P AND Q. TRACTOR P, WORKING ALONE, CAN PLOUGH A PIECE OF LAND IN 5 HOURS WHILE TRACTOR Q WOULD TAKE ON AND TWO-THIRDS HOURS LESS THAN TRACTOR P.

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 17

​A PARTICLE MOVES IN A STRAIGHT LINE FROM A FIXED POINT. THE VELOCITY V MS^-1 OF THE PARTICLE AFTER T SECONDS IS GIVEN BY V=T^2 - 4T + 6.

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 16

THE POSITION VECTORS OF POINTS P, Q AND R ARE [1 -1 3], [3 3 1] AND [6 9 -2] RESPECTIVELY. SHOW THAT POINTS P, Q AND R ARE COLLINEAR

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 15

SOLVE THE EQUATION

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 14

​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 13

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 12

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 11

​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 10

​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 9

​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 8

​​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 7

Two variables x and y are such that y varies directly as x^n where n is a constant

​​​​KCSE 2020 MATHEMATICS ALT A PAPER 2 QUESTION 6

Make V the subject of the formula:

MARKING SCHEME

The sum of the first two terms of an increasing Geometric Progression (GP) is 20. The sum of the second term and the third term of the same GP is 30.
Determine the common ratio of the GP. (4 marks)