There is at least one red ball and at least one blue ball in a box. How many blue balls are there?

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There is at least one red ball and at least one blue ball in a box. How many blue balls are there?

(1) From any two balls from the box, at least one is a red ball.
(2) The total number of balls in the box is 99.

Answer: A

Source: GMAT Club Tests
Source: — Data Sufficiency |