Well done to those of you who tried last week’s Maths Challenge – anybody who got a time of under 15 seconds can have 2 HPs!
Now we are back to proper maths challenges and here is your next one…
I’VE LOST MY MARBLES!
You have three bags each containing two marbles. Bag A contains 2 white marbles, Bag B contains two black marbles and Bag C contains one white and one black marble.
You pick a bag at random and take out one marble. It is a white marble.
What is the probability that the remaining marble from the same bag is also white?
Leave a comment with your answer below! ( If you are trying to write a fraction you can use the / symbol e.g. 4/5)
4/6
3/4
4/3
two sixths
i think it is 1/2
I think that it is 4/5ths
Well done Tom and Jaden, you are right with your answer of 1/2 or equivalent. 5HPs to each of you!
This is because there are only two bags with white marbles in – one has one white marble left in it and one has one back marble left – therefore there is a 50% or 1/2 chance you would pick the remaining white marble.
1/2
It is 1/2
it is 1/2 because there is 1 black and one white and because there is 2 in the bag and because there is only 1 white one it will be 1/2
1/2
Every body has just put1/2 because miss shearer has awlready said the answer
1\2