Question : MAX value of a column

I want to get the MAX vlaue for the item using excel formulae.How can I do that?

e.g. in the columns mentioned below, If I enter the formulae in column C, it will give me as follows:
A      B                           C
A      B      C
Apple      10      20
Apple      2      20
Orange      2      56
Orange      3      56
Apple      4      20
Apple      5      20
Orange      4      56
Orange      56      56
Apple      20      20
Orange      23      56
Orange      43      56

Answer : MAX value of a column

Use this formula...

=Max(if((a1:a100=a1),b1:b100,""))

And this is an array formula enter by ctrl+shift+enter

Saurabh