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Two groups of male students cast their vote on a particular proposal. The results are...

Mathematics
WAEC 1990

Two groups of male students cast their vote on a particular proposal. The results are as follows:

  In favor Against
Group A 128 32
Group B 96 48

If a student is chosen at random, what is probability that he is against the proposal?

  • A. 3/19
  • B. 4/19
  • C. 5/19
  • D. 9/19
  • E. 10/19
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Correct Answer: Option C
Explanation

Probability that the student is against the proposal

= \(\frac{32 + 48}{128 + 32 + 96 + 48}\)

= \(\frac{80}{304}\)

= \(\frac{5}{19}\)


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