Maths, Addmaths and Statistics: Post your doubts here!

[Jaguar]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s11_qp_22.pdf
Q 12, which test was harder?
I know you wouldn't want to draw the graph for the first test, but here's the complete info: 19 % of the students took atleast 95 mins to complete the first test, and in the second test 25 % of the students took at least 95 mins.
So which one's harder?

The past paper and it is the best to find the median value for both. More median for the past paper than = students took longer time for past paper. Hence, it was probably a hard paper.

 

[Minnie]

http://www.xtremepapers.com/papers/...Calculator Version) (4024)/4024_w11_qp_22.pdf
Q3 please? i dont get how to do it.

 

[kitecrystal]

the test having lower median mark is harder.......

sorry the one with lower median mark is harder since its compared with time

 

[Jaguar]

wh

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w11_qp_22.pdf
Q3 please? i dont get how to do it.

which part?

 

[Jaguar]

no

sorry the one with lower median mark is harder since its compared with time

no, lower median means lower time. So more students could finish the papers in shorter time. Hence, it was probably an easy paper

 

[scouserlfc]

yeah but we first have to know this before finding the cordinates of its image as asked in the question. i don't know how to get them

DUde isnt it simple just multiply the tansformation matrix with the object coordinates and there u have ur answer

 

[scouserlfc]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s11_qp_22.pdf
Q 12, which test was harder?
I know you wouldn't want to draw the graph for the first test, but here's the complete info: 19 % of the students took atleast 95 mins to complete the first test, and in the second test 25 % of the students took at least 95 mins.
So which one's harder?

The paper in which more people took more time to finish that is the 25% wala is more difficult and the 19 something wala is easy as compared to it due to this reason !

 

[Minnie]

wh
which part?

wh
which part?

both parts.

 

[asd]

The paper in which more people took more time to finish that is the 25% wala is more difficult and the 19 something wala is easy as compared to it dude to this reason !

That's what i'm saying too, but the ms says that 19% wala is harder.

 

[Jaguar]

both parts.

(a) (i) 1 line of symmetry (INCLUDING THE SHADE)
(ii) (72/360 * pi * R^2) - (pi * r^2)= pi * r^2
1/5 * pi * R^2 = 2 pi * r^2
R^2 = 10 r^2

R^2 is 10 times longer.
Hence, ratio = 10:1

 

[scouserlfc]

That's what i'm saying too, but the ms says that 19% wala is harder.

Nah i just checked it and it was 25% wala check again !

 

[Jaguar]

both parts.

(b) (i) OAC = OBC = 90 (angle of the tangent)
BOA = 360/5 = 72
BCA = 360 - 72 - 90 -90 (sum of angle in quadrilateral)
BCA = 108
Reflex BCA = 360 - 108 = 252 (shown)

(ii) Total perimeter = 5 * 252/260 * 2 * pi *r
= 7 * pi *r
k = 7

 

[Minnie]

(a) (i) 1 line of symmetry (INCLUDING THE SHADE)
(ii) (72/360 * pi * R^2) - (pi * r^2)= pi * r^2
1/5 * pi * R^2 = 2 pi * r^2
R^2 = 10 r^2

R^2 is 10 times longer.
Hence, ratio = 10:1

thanks

 

[asd]

Nah i just checked it and it was 25% wala check again !

It says that since there are more students to complete the test in atleast 95 mins, so previous test is harder. Previous test was 19% wala.

 

[Jaguar]

what's the difference between paper 21/22/23?

 

[SilverCrest]

http://www.xtremepapers.com/papers/...Calculator Version) (4024)/4024_w11_qp_22.pdf

How to do 9 c)iii)b)..?

 

[pakiboy]

wat u all got the ans for that sig fig. quest one mine was 300!

 

[kitecrystal]

wat u all got the ans for that sig fig. quest one mine was 300!

mine was 300 as well

 

[pakiboy]

mine was 300 as well

hope this is correct ans u got 300 directly! or after rounding the final ans ........

 

[kitecrystal]

hope this is correct ans u got 300 directly! or after rounding the final ans ........

i got it directly