The question can't be answered without knowing how many red marbles and how many blue marbles are in the bottle.
To find the probability that at least one of the marbles chosen is red, we calculate the probability of picking two blue marbles and subtract it from 1. The formula we use is P ( at least one red ) = 1 − ( R + B B × R + B − 1 B − 1 ) . Actual numbers for red and blue marbles must be provided to get a specific answer.
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1. 阿德丽娅2. 努赖妮3. 阿德丽娜 努赖妮