Letters on cards of two colours

Letters on cards of two colours

Secondary 2
5 marks
TGM Original Questions

Each object in the stated selection population is equally likely to be selected.

MARCUS is written on six grey cards and ALICE on five white cards, one letter per card. One of the 11 cards is selected. Find the probability that

  1. the letter is A,[1]
  2. the card is white,[1]
  3. the card is white or shows A,[1]
  4. the card is white and shows A,[1]
  5. the card is grey and shows C.[1]

Solution:

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Answer:(i) \(\frac{2}{11}\) (ii) \(\frac{5}{11}\) (iii) \(\frac{6}{11}\) (iv) \(\frac{1}{11}\) (v) \(\frac{1}{11}\).

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