2011 hsc mx1 marathon (1 Viewer)

[Drongoski]

 

[OmmU]

lol i wish that was in this year's exam instead of last year's.

Haha I know right ^_^ Fingers crossed it is even easier

 

[Vidhya]

Find the probability that of 5 cards chosen from a 52-card deck that 2 will be of the same suit.

I got 12/52 + 12/51 + 12/50 + 12/49 = 0.9509
Probably very wrong, but would you mind giving me the solution?

 

[apollo1]

I got 12/52 + 12/51 + 12/50 + 12/49 = 0.9509
Probably very wrong, but would you mind giving me the solution?

its one lol.

 

[Vidhya]

its one lol.

I was off by .05 but how did you get one? sorry i'm a bit slow with probability

 

[someth1ng]

I was off by .05 but how did you get one? sorry i'm a bit slow with probability

There's 4 suits - if you pick 5 cards then there must be one pair since the most spreaded result is one of each suit + 1 more card - there must be a pair.

 

[nightweaver066]

I was off by .05 but how did you get one? sorry i'm a bit slow with probability

There are only 4 suits so it is impossible to pick 5 different suits meaning the probability of getting two cards of the same suit is 1 lol.

 

[Vidhya]

Ohhh, I feel stupider now than when I posted the wrong answer thanks guys!

 

[barbernator]

There are only 4 suits so it is impossible to pick 5 different suits meaning the probability of getting two cards of the same suit is 1 lol.

BUT!!! what if the question asks for 2 only, not 3, 4 or 5 of the same suit, then there would be a probability less than one, but the question doesn't specify, so im just being difficult

 

[barbernator]

bump

 

[barbernator]

what is the amplitude and period of:

 

[apollo1]

what is the amplitude and period of:

amplitude = 1/2
period = pi/3

 

[Sanical]

On a building construction site, an object falls from a crane in a vertical straight line. The object passes a 2 metre high windows in a time interval of one tenth of 1 second.
Find the height above the top of the window from which the object was dropped
Take g = 9.8

 

[SImon05089]

^ correct me if im wrong, the height above the top of the window = 19.42 metres (2dp)

 

[barbernator]

19.42m

 

[barbernator]

^ correct me if im wrong, the height above the top of the window = 19.42 metres (2dp)

thats right

 

[Sanical]

^ correct me if im wrong, the height above the top of the window = 19.42 metres (2dp)

Yep Hopefully you didn't look at answers though

 

[barbernator]

was that question in an HSC test?

 

[SImon05089]

>.> i thought u made it up!

new quick question:

if y = 10^x, find dy/dx when x = 1

 

[Sanical]

>.> i thought u made it up!

new quick question:

if y = 10^x, find dy/dx when x = 1

10^x ln(10)