I had to use a tree diagram to work out all the possible outcomes (arrangements of boys and girls) in a family of 4 children. I worked out that there are 14 possibilities. From here I am stuck, I have to calculate the theoretical possibility of obtaining 2 girls and 2 boys as a fraction, decimal and percentage. I worked out that there are 6 possibilities out the 14

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but where do I go from here??

Thanks very much in advance!!!