How much google ad we can place on adsense website

When I was very new in this huge blogger world .I don't know the answer of simple question.I struggle a lot to get answers.no one is there to tell except some good website.

We can place :-

1). 3 text ad
2). 3 link unit
3). 2 search box.

I know this is vary basic.but very informative for new blogger

Posted in: Adsense Basic