Write the number of ways in which 5 red and 4 white balls can be drawn from a bag containing 10 red and 8 white balls.
Question:
Write the number of ways in which 5 red and 4 white balls can be drawn from a bag containing 10 red and 8 white balls.
Solution:
4 white and 5 red balls are to be selected from 8 white and 10 red balls.
$\therefore$ Required number of ways $={ }^{8} C_{4} \times{ }^{10} C_{5}$
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