A bag has 7 marbles, one of each colours green,blue,brown, yellow,red white and pink.if 6 marbles are removed from the bag,what is the probality that the red one was removed?
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p(red marble are removed)=1/7
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There are 7 different colours.
Probability of each colour =
(Number of marbles of that colour) ÷ total number of marbles.
There is only one red marble.
So it's probability =
(Number of red marbles)÷ total number of marbles
= 1/7.
Hope this explaination is nice enough...
mariabutt60:
dear all but answer is 6/7 .
MAYBE, so when you remove that 1/7 (red) from the total you get 6/7 ?
yes
Probability of red one removed means the probability of the remaining colours. So it's 6/7
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