# A bag contains 12 beads 2 of the beads are blue, 1 of the beads are green, 3 of the b

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Thread starter 4 weeks ago
#1
A bag contains 12 beads 2 of the beads are blue, 1 of the beads are green, 3 of the beads are purple the rest are red Julia takes a bead at random what is the probability that this bed is purple or red is 3/4
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4 weeks ago
#2
(Original post by Charlotte.g206)
A bag contains 12 beads 2 of the beads are blue, 1 of the beads are green, 3 of the beads are purple the rest are red Julia takes a bead at random what is the probability that this bed is purple or red is 3/4
How many are purple do you think?
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Thread starter 4 weeks ago
#3
(Original post by Muttley79)
How many are purple do you think?
3 off them are purple as it states in the question
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4 weeks ago
#4
(Original post by Charlotte.g206)
3 off them are purple as it states in the question
And how many red?
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4 weeks ago
#5
(Original post by Charlotte.g206)
A bag contains 12 beads 2 of the beads are blue, 1 of the beads are green, 3 of the beads are purple the rest are red Julia takes a bead at random what is the probability that this bed is purple or red is 3/4
Let's seperate the beads into their colours:
2 blue 1 green 3 purple
There are 12 beads in total so you can figure out the number of red beads.

P.s.
P(A or B) = P(A)+P(B) - this is the 'rule' you need to answer this q.
Last edited by Da14a; 4 weeks ago
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4 weeks ago
#6
(Original post by Da14a)
Let's seperate the beads into their colours:
2 blue 1 green 3 purple
There are 12 beads in total so
It's against the rules to post a solution - please edit your post
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4 weeks ago
#7
(Original post by Muttley79)
It's against the rules to post a solution - please edit your post
Wow, I had no idea - I thought your posts were just unhelpful. Looks like I was the fool all along
1
4 weeks ago
#8
(Original post by Da14a)
Wow, I had no idea - I thought your posts were just unhelpful. Looks like I was the fool all along
I was trying to get the OP to get the answer with a hint.

It's good to have people helping - just give a hint - the rules are in a sticky in the Maths forum
1
4 weeks ago
#9
5/6?
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4 weeks ago
#10
(Original post by tinygirl96)
5/6?
Are you claiming this is the answer to the original question?

How did you arrive at that result?
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4 weeks ago
#11
I can work out the answer but am confused by the very last part of the question. Is that 3/4 supposed to be in the question?
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4 weeks ago
#12
(Original post by Catherine1973)
I can work out the answer but am confused by the very last part of the question. Is that 3/4 supposed to be in the question?
I wasn't sure whether the OP was quoting the answer and wanted to know how to work it out, or was suggesting it as their answer
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4 weeks ago
#13
Yes that makes sense.
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4 weeks ago
#14
A tree diagram would help.
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