Afruit basket contains oranges and grapefruits. one-third of the oranges and one-fourth of the grapefruits were spoiled. you threw away 4 oranges and 7 grapefruits

1/3 oranges were spoiledu threw away 4 oranges...
1/3 of what = 4
1/3x = 4
x = 4 * 3
x = 12 oranges

1/4 grapefruits were spoiledu threw away 7
1/4 of what = 7
1/4x = 7
x = 7 * 4
x = 28

so ur fruit basket contained 12 oranges and 28 grapefruits before u discarded the spoiled ones

It is 2 out of 8 she will pick green and 3 out of 7 she will pick green but red and green would be 5 out of 5 so 50% chance