Sec 3/4 E Math T13-Q08 - Two dependent selections without replacement

Sec 3/4 E Math T13-Q08 - Two dependent selections without replacement

Secondary 3
Original parallel to Sec3&4 E Math FA

A bag contains \(7\) red counters and \(5\) blue counters. Two counters are selected at random without replacement.

  1. Find the probability that both counters are red.
  2. Find the probability that the counters are of different colours.

Solution:

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Answer:(a) \(\frac{7}{22}\); (b) \(\frac{35}{66}\).

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