There's really nothing definite when it comes to feeding recommendations, except that the proper ratio of nutrients are needed, as well as fiber, to keep a rabbit healthy and keep it's digestion functioning well. We can share recommendations and what has worked for our own rabbits, but really you have to just see what works well to keep your rabbit healthy and at a good weight. You want your rabbits back and rump, nice and rounded and not boney. You may find that a 1/4 cup of pellets works for your rabbit, but if you start seeing weight loss, you will need to increase that amount. It is also good to feed as much grass hay as your rabbit will eat before the next feeding. Hay is good for digestive health and their teeth, plus having it to munch on helps keep rabbits busy and from getting bored. The more you get to know your rabbits and their health, the better you'll understand what type of feeding works best for them. I have several rabbits, and none of them have the same dietary needs. Some get less pellets or they get soft poop, some get more pellets, to keep their weight up, some get no pellets as they are sensitive to them and it makes them sick. But they all get lots of grass hay. I would suggest doing a little research on how a rabbits digestive system works, and also what their poop should look like, and what it means if it doesn't look normal. A change in a rabbits poop, can often be the first sign that something is wrong with your rabbit. Here are a few links with some good info on rabbit health.
http://www.veterinarypartner.com/Content.plx?P=A&A=3015&S=5&SourceID=43
http://www.medirabbit.com/EN/GI_diseases/drop/Drp_en.htm
For fruit, it just depends on amounts and how sensitive your rabbits are to sugars. Some rabbits can't tolerate any sugars without getting sick. And you don't want to overload a rabbit with too many sugars, as that can disrupt the bacterial balance in the gut, and make a rabbit sick. You also have to consider that dried fruit is concentrated, and some dried fruit like mango, usually has added sugars in it, so you would have to feed an even smaller amount than fresh fruit.