Mathematics, 07.11.2020 20:30 Bassoonist
There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is 2 9 . There are 63 marbles in total in the bag and each is equally likely to be chosen. Work out how many red marbles there must be.
Answers: 3
with 
which gives, 
which when evaluated gives 
and the numerator is the number of red marbles in the bag. So there are 14 red marbles in the bag :DAnother question on Mathematics
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There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red ma...
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