(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

There is total of 300 balls in the basket, 30 of them is red (rest is white). If we picked up, randomly, 4 balls, what is the probabilty that all of them is red ?

2. The attempt at a solution

For one picked ball, probability that it's red is 30/300 = 1/10.

If picked ball is red, probabilty for next ball is 29/299,and so on, 28/298, 27/297.

Is that correct ? And, what next ?

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# Homework Help: Probability when seleting balls from an urn

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