Quick Q (1 Viewer)

[Paj20]

There are 3 types of ice creams, Strawberry, Chocolate and Caramel. Ike wants any two different flavors on her ice cream. What is the probability that she chooses Strawberry first and chocolate second?

 

[phosphorescent]

Can she double up on her the flavours, or not?

Cos if not, I think it's 1/6.

 

[lyounamu]

There are 3 types of ice creams, Strawberry, Chocolate and Caramel. Ike wants any two different flavors on her ice cream. What is the probability that she chooses Strawberry first and chocolate second?

It is replaced or not replaced?

Replaced: 1/3 x 1/3 = 1/9

Not replaced: 1/3 x 1/2 = 1/6

 

[Paj20]

It is replaced or not replaced?

Replaced: 1/3 x 1/3 = 1/9

Not replaced: 1/3 x 1/2 = 1/6

i no... it dosent say thats what i was wondering.. the answer is 1/9 according to the book

 

[lyounamu]

i no... it dosent say thats what i was wondering.. the answer is 1/9 according to the book

Yeah, I knew it was 1/9 too considering the nature of the question. It's not like the flavour gets depleted once you use one.

 

[PC]

Just think of listing all the possibilities.

S,S
S,Ch
S,Ca
Ch,S
Ch,Ch
Ch,Ca
Ca,S
Ca,Ch
Ca,Ch

Clearly, there is only one way of getting S,Ch, so the probability is 1/9.

However, is the question restricted so that it's not possible to have two scoops of the same flavour. In that case, delete the S,S, Ch,Ch and Ca,Ca and the probability is 1/6.

It's not really a case of replacement or non-replacement.

 

[Timothy.Siu]

Yeah, I knew it was 1/9 too considering the nature of the question. It's not like the flavour gets depleted once you use one.

cud be one scoop left of each =P

 

[syriangabsta]

Just think of listing all the possibilities.

S,S
S,Ch
S,Ca
Ch,S
Ch,Ch
Ch,Ca
Ca,S
Ca,Ch
Ca,Ch

Clearly, there is only one way of getting S,Ch, so the probability is 1/9.

However, is the question restricted so that it's not possible to have two scoops of the same flavour. In that case, delete the S,S, Ch,Ch and Ca,Ca and the probability is 1/6.

It's not really a case of replacement or non-replacement.

@__@ thats alot of time wasted

 

[lyounamu]

cud be one scoop left of each =P

Shall we calculate the chance of that?

 

[cxlxoxk]

Just think of listing all the possibilities.

S,S
S,Ch
S,Ca
Ch,S
Ch,Ch
Ch,Ca
Ca,S
Ca,Ch
Ca,Ch

Clearly, there is only one way of getting S,Ch, so the probability is 1/9.

However, is the question restricted so that it's not possible to have two scoops of the same flavour. In that case, delete the S,S, Ch,Ch and Ca,Ca and the probability is 1/6.

It's not really a case of replacement or non-replacement.

this is called the trial and error method, please don't use it, your going to waste too much time...instead just try multiplying 2 values... hence 1/3 * 1/3 which is 1/9