Q13 (2 Viewers)

[EinstenICEBERG]

Find gradient of AB

Hence since they are perpendicular, you can find gradient of CN.

Find equation of CN using co-ordinates of C.

Solved AB and CN simultaneously to find N.

for some reason i dont get (3,2).. what was the perpendicular distance used for? i dont think we need it.. but i simult and got y = 6/5

 

[cookeemonstah]

i got 21 1/3 but i think its wrong (did it in a rush) since part of it was negative.

 

[EinstenICEBERG]

OH DAMN...... I forgot to OMG... I LOST ONE MARK NOOOOOOOOOOOOOOOOOOOOOOOOOOO!. forgot to switch the one to the other side to neg. one !!

 

[RealiseNothing]

i got 21 1/3 but i think its wrong (did it in a rush) since part of it was negative.

That's right iirc.

 

[osak23]

^^

will i get a mark for getting the correct co-ordinates (3,2) without any working?
:S

 

[EinstenICEBERG]

^^

will i get a mark for getting the correct co-ordinates (3,2) without any working?
:S

i dont think so...CHEATER!!

 

[lance687876]

oh shit.....
l got 6/5 and 7/5 for the coordinates of N
damn...
l lost 3 marks
so that's 14 definite marks gone. l don't think l can get band 5 now

 

[Timske]

oh shit.....
l got 6/5 and 7/5 for the coordinates of N
damn...
l lost 3 marks
so that's 14 definite marks gone. l don't think l can get band 5 now

I somehow got (1,4) so devo..

 

[lance687876]

but you haven't lost 20 definite marks right?
all that effort these 2 years was for nothing.
all because of some silly mistakes...

 

[Timske]

but you haven't lost 20 definite marks right?
all that effort these 2 years was for nothing.
all because of some silly mistakes...

method was correct, please dear god oh god i love you please give me 2/3 marks!

 

[Timske]

What did you guys get for 13 C

 

[Joey7]

Can someone confirm what the answer for b(ii) is?

 

[sghguos]

Guys does anyone have the answers for the probability for the hsc. Here are the Q's

Q 13 C)

Two buckets each contain red marbles and white marbles. Bucket A contains 3 red and 2 white marbles. Bucket B contains 3 red and 4 white marbles.

Chris randonly chooses one marble from each bucket

i) what is the probablility that both marbles are red

ii) what is the probability that at least one of the marbles are red

iii) what is the probability that both marbles are the same colour




My answers:

i) 9/35

ii) 26/35

iii) 9/35 +8/35 = 17/35

 

[Strangeoranges]

Re: Guys does anyone have the answers for the probability for the hsc. Here are the Q

Isn't it

i)

0.5 x 3/5 x 2/4 x 0.5 x 3/7 x 2/6 ??

 

[megaman64]

Re: Guys does anyone have the answers for the probability for the hsc. Here are the Q

Q 13 C)

Two buckets each contain red marbles and white marbles. Bucket A contains 3 red and 2 white marbles. Bucket B contains 3 red and 4 white marbles.

Chris randonly chooses one marble from each bucket

i) what is the probablility that both marbles are red

ii) what is the probability that at least one of the marbles are red

iii) what is the probability that both marbles are the same colour




My answers:

i) 9/35

ii) 26/35

iii) 9/35 +8/35 = 17/35

i got the same

 

[nerdasdasd]

Uh oh, I got 18/35 for i...... Nooooo I stuffed up probability ...

 

[Strangeoranges]

Re: Guys does anyone have the answers for the probability for the hsc. Here are the Q

I got it way wrong then...Goodbyehscmarks

 

[megaman64]

Re: Guys does anyone have the answers for the probability for the hsc. Here are the Q

i) 3/5 * 3/7 = 9/35

i think this is right

 

[captainpigs]

that questionw as so frustrating. but yeah 3,2 it was

 

[Strangeoranges]

Re: Guys does anyone have the answers for the probability for the hsc. Here are the Q

But he randomly chooses from two buckets.

So don't you need to times it by 0.5 because of that?

Plus he picks two of them