There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red 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.

77

Step-by-step explanation:

If the probability of choosing a red marble is 11/12, then 11/12 of the marbles in the bag must be red. Therefore, the number of red marbles is 84*11/12=7*11=77 marbles. Hope this helps!

1/3

step-by-step explanation:

to find this, you can divide 12 by 4 which is 3 or you can multiply 4 until you reach 12 (4x3=12). both should give you 3, meaning theres three times less bananas than there are oranges.