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Maths, Addmaths and Statistics: Post your doubts here!

exploded diper

exploded diper

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I AM OF....
ASLAM O ALAIKUM .......
 
M.Omar

M.Omar

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Guys in questions ab locus where they usually ask us to trace he locus inside the region i.e triangle/quadrilateral ..Can we extend the locus outside the region or by a small bit or have to strictly adhere to being inside the fig...Also since two or three locus are defined do we have to differentiate by a mark or question part..I know we have to show the arcs in perp bisector and triangle constr, wht abt angle bisector?
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w07_qp_1.pdf I am talking in reference to last question of this ppr
asadalam Awesome12 FLRNAB
Also DAZ1234 H=here is an estimation question where we don't have to est every fig to 1 sig fig .I know it is quite conspicuous here to estm to underroot 144 but the pt is tht if they do expect us to do these estm then it stands to reason tht estm frm 38.89 wud be 39 not 40 coz we can simply find the answer frm 39
http://papers.xtremepapers.com/CIE/...Calculator Version) (4024)/4024_w13_qp_11.pdf
Any ideas abt this as well.coz we don't want to waste marks on a question there for the taking and yet we cud not!Is it sensible to conclude tht the answers shud be to no decimal points?
 
FLRNAB

FLRNAB

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M.Omar said:
Guys in questions ab locus where they usually ask us to trace he locus inside the region i.e triangle/quadrilateral ..Can we extend the locus outside the region or by a small bit or have to strictly adhere to being inside the fig...Also since two or three locus are defined do we have to differentiate by a mark or question part..I know we have to show the arcs in perp bisector and triangle constr, wht abt angle bisector?
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w07_qp_1.pdf I am talking in reference to last question of this ppr
asadalam Awesome12 FLRNAB
Also DAZ1234 H=here is an estimation question where we don't have to est every fig to 1 sig fig .I know it is quite conspicuous here to estm to underroot 144 but the pt is tht if they do expect us to do these estm then it stands to reason tht estm frm 38.89 wud be 39 not 40 coz we can simply find the answer frm 39
http://papers.xtremepapers.com/CIE/...Calculator Version) (4024)/4024_w13_qp_11.pdf
Any ideas abt this as well.coz we don't want to waste marks on a question there for the taking and yet we cud not!Is it sensible to conclude tht the answers shud be to no decimal points?
Click to expand...
Strictly inside. They bold the word inside. In Rxaminer Eeport they say cansidates should ppen their eyes wide and read the question carefully.
 
exploded diper

exploded diper

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Lilly2318 said:
gview
Both parts
Click to expand...
(a) suppose that the three scores are x, y, and z
he says that his median score was 8 so that means that y=8
then he says that his mean was nine
so we form an equation
(x+ y + z )/ 3 = 9
(x + 8+z) /3 = 9
x +8 +z = 27
then it says that his highest score was 7 more then his lowest
which means that z = 7 + x
so we substitute this in the previous equation and get
X + 8 + X + 7 = 27
by solving x comes out to be 6
add 7 + 6 to get z
z is 13
so his scores x , y , z are 6 , 8 , 13
 
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