There is a bag with only red marbles and blue marbles. The probability of randomly choosing a blue marble is 11 12 . There are 84 marbles in total in the bag and each is equally likely to be chosen. Work out how many red marbles there must be. Check Skip Do not use a calculator Get help Report a mistake to HegartyMaths Quit assessment On-screen keypad ON OFF Probability of single events (2)

There is a bag with only red marbles and blue marbles. The probabili

1.	There is a bag with only red marbles and blue marbles. The probability of randomly choosing a blue marble is 11 12 . There are 84 marbles in total in the bag and each is equally likely to be chosen. Work out how many red marbles there must be. Check Skip Do not use a calculator Get help Report a mistake to HegartyMaths Quit assessment On-screen keypad ON OFF Probability of single events (2)
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