Igcse Model Questions Vol1 2017 Mathematics Question 3
Practice objective / multiple choice question 3 from the 2017 Igcse Model Questions Vol1 Mathematics examination.
A box contains some white and black balls. Initially there are 5 white balls and an unknown number of black balls. A ball is drawn at random, its colour noted, and then it is replaced together with two additional balls of the same colour. A second draw is then made from the enlarged collection. The probability that both drawn balls are white is \(\frac{35}{48}\). Find the total number of balls that were originally in the box.
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About This Question
This is Igcse Model Questions Vol1 2017 Mathematics Question 3. It is one of the objective questions from the 2017 Igcse Model Questions Vol1 Mathematics examination.
Difficulty level: Hard .
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