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121/2 MATHEMATICS ALT. A Paper 2 Nov. 2016 2'A hours

Index Number ........... Candidate's Signature Date.............................

THE KENYA NATIONAL EXAMINATIONS COUNCIL Kenya Certificate of Secondary Education

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Total

Section II 17 18 19 20 21 22 23 24 Total

Grand Total

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? 2016 The Kenya National Examinations Council 121/2

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2 SECTION I (50 marks) Answer all the questionsfrom this section in the spaces provided.

1. Simplify p f p - p f p ;

(3 marks)

2. 3.

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of 788 matrix

X

(3

0.006. marks)

Calculate the area of the image of triangle FGH

(2 marks)

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Kenya Certificate of Secondary Education, 2016 121/2

3 4. Make s the subject of the formula.

w = 3 s+1

(3 marks)

5. 1m

6.

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916017

Kenya Certificate o fSecondary Education, 2016 121/2

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4

7. The masses in kilograms of 20 bags of maize were: 90, 94, 96, 98, 99, 102, 105, 91, 102, 99, 105, 94, 99, 90, 94, 99, 98, 96, 102 and 105. Using an assumed mean of 96 kg, calculate the mean mass, per bag of the maize. (3 marks)

8. m3

JU iS?

The (a)

(b)

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is

3.

(1 mark) (2 marks)

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Kenya Certificate o fSecondary Education, 2016 121/2

5

9. A bag contains 2 white balls and 3 black balls. A second bag contains 3 white balls and 2 black balls. The balls are identical except for the colours. Two balls are drawn at random, one after the other from the first bag and placed in the second bag.

Calculate the probability that the 2 balls are both white.

(2 marks)

10. 11.

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length, of the same

(4 marks)

*

(2 marks)

>:?-

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Kenya Certificate of Secondary Education, 2016 121/2

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6

12. (a) Expand the expression (1 + ^ x)5in ascending powers ofx, leaving the coefficients as

fractions in their simplest form.

(2 marks)

13.

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) 5. marks)

the marks)

Kenva Certificate o f Secondary Education. 2016

7

14. Water and milk are mixed such that the volume of water to that of milk is 4:1. Taking the

density of water as 1g/cm3and that of milk as 1.2 g/cm3, find the mass in grams of 2.5 litres of

the mixture.

(3 marks)

15. in.

16.

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................

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