Part A)
30 more than two-fifths of the customers chose bananas.
We now we have "n" customers, two-fifths of the customers are

If 30 more than two-fifths of the customers chose bananas, it would be

10 fewer than one-fifth of the customers chose apples:
one-fifth of the customers are

Therefore we have:

And the last one, oranges:
5 more than one-fifth of the customers chose oranges
One-fifth of the customers:

5 more than

Part B
To find the expression that represents it we must sum the bananas expression with the oranges expression, and then simplify it

The simplified expression is
