SOLUTION
TO SERIES 2FORM FOUR WEEKLY MATH’S ANSWER
NECTA
2012
SECTION
A:
Qn.1
(a)
Solution:
Qn.1
(b)
Solution:
Qn.2
(a)
Solution:
Qn.2
(b) Solve
Solution:
Qn3
(a) Solution:
Qn3
(b) Solution:
Alternatively:
Qn.
4(a) Solution:
Qn.
4(b) Solution:
Qn.
4(c) Solution:
Qn.
5 (a) Solution:
Qn.
5(b) (i) Solution:
Qn.
5(b) (ii) Solution:
Qn. 6 (a)
Solution:
Qn.
6(b) Solution:
Qn7. (a)
Solution:
Qn7. (b)
Solution:
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Qn8. (a)
Solution:
Qn.8 (b) Solution:
Qn9. (a) Solution:
Qn9 (b) Solution:
Qn10.
(a) Solution:
Qn.
10 (b) Solution:
SECTION
B:
Answer
any four (4) questions
Qn11.
(a) Solution:
Qn11.
(b) Solution:
Qn11.
(c) Solution:
Qn11.
(d) Solution:
1st
step:
Prepare
the table of values for each inequality:
(e)still
to come
Qn12.
In a survey of the number of children in 12 houses, the following
data resulted : 1,2,3,4,2,2,1,3,4,3,5,3.
Qn12.
(a) Solution:
Qn12.
(b) Histogram and frequency polygon
THE
FREQUENCE POLYGON
Qn.12(c)
Solution:
The
mean
The
mode
Solution:
Mode
refers to the value with the highest frequency which in this case is
3
Qn13.(a). Solution:
To solve this
question first you have to find the outer volume and then you find
the inner volume after which you
Deduct the inner
volume from the outer volume.
12960-11250
=1710cm3
Qn13. (b) Solution:
Qn14.
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Qn. 15(a) Solution:
A singular matrix is
a matrix whose determinant is equal to zero.
Hence the value of
“k” is either 6or -1/2
Qn.15 (b) Solution:
The reflection in
the x-axis is given by
Qn.15 (c) Solution:
solving simultaneous
equations by using matrix method.
Qn16. (a) Solution:
Draw a tree diagram
to show the results of the drawing
Qn. 16(b) Solution:
The probability that
both are black is
Qn.16 (c) Solution:
Probability that
both are of the same color
Qn. 16(d) Solution:
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