on behalf of 2E7'07

WISHING WEITING A SPEEDY RECOVERY(:

hope to see yoo back in school again,chairman

valerie(:

common test answer key!~
Q1) a. mean =1065/20
=53.25

b.middle number=n/2 & n/s+1
=10th and 11th number
=46 & 46
median = (46+46)/2
=46
c.modal score = most common
=100
d. 20-3=17
17students failed
17/20*100% =85%
e. 44-48 marks-10students
probability=10/20*100%
=50%
f. median,pick out the middle score,since the median is 46,this means that more then 50% of the class failed the test.so the teacher need to give remedial to all the students except for the 3 students who scored 100.

Q2)a. 27
b. 17+26+11=54
54-14-18=22
c. 280+4x/86+x=3.36
280+4x=3.36(86+x)
280+4x=288.96-280
0.64x=8.96
x=8.96/0.64
=14
d.students that participated in less then 3events=54
120-54=66
probabilty=66/120*100%
=55%
Q3)(a) i. I'={children who dislike ice cream}
ii.n(JnC)
(b)i.the set of children who likes chocolates and dislike sweets.
ii.the set of children who likes ice cream and sweets.
(c)i. P={2,3,5,7,11,13,17,19,23,29}
ii.Q={1,2,3,4}
Q4)a)1/4
b)1/13
c)1/52
d)4/13
e)1/2

Q5)a)1/49
b)48/49
use area...not the radius

Q6)value of x=3
value of y=8

k is the average weight of 20students
j is the average weight of 20students
863+6z/20=k
j =0.8+k
x is the only unknown no. we want to find.
6z=x
863+63+6z/21=(863+6z/20)+0.8
863+63+6z/21=863+6z+16/20
20(863+63+6z)=863+6z+16(21)
17260+1260+20(6z)=18123+21(6z)+336
18520-18459=21(6z)-20(6z)
61=6z
value of z = 1

ppl.
its really now taking the initaitive to update the class blog ok?
come on im not the onli one is will always be updatting.
if dat is the case,
it will not be called a class blog.
its a VALERIE blog.
so far onli kylie and jasper updated.
i added so many ppl to the alumni.
and its like onli 3 of us update.
hmm.
well old folks trip.
good luck ppl.
old folks BITE.
hahar.
some pics?
i tink i haf some.

i'll end off with ur all time fav.
nive =)

valerie(:

the class blog seems dead.
and its like
all the time valerie yeo updating.
others pls update larh.
valerie yeo is now nerd and seldom use com alr.
to spammer:
valerie is here to tell u to fuck off.
dont disturb monkey.
abusing of animals is not correct.
and u bloody wan settle go outside settle.
dun kaopeh here.

valerite(: