Algebra
Data and statistics
Two-way tables
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Questions
Question 1
202629
An elementary school class was surveyed on whether its students can swim. The results are shown in the two-way table.
| Can swim | Cannot swim | Total | |
| Boys | \(24\) | \(5\) | |
| Girls | \(16\) | \(3\) | |
| Total |
(ii) How many students are boys or cannot swim?
(iii) A student is chosen at random. What is the probability that the student cannot swim?
(iv) What is the probability that the student is a girl who can swim?
Part a:
48
students
1 mark
Part b:
32
students
1 mark
Part c:
\(\dfrac{5}{6}\)
\(\dfrac{1}{5}\)
\(\dfrac{5}{48}\)
\(\dfrac{1}{6}\)
Correct
Part d:
\(\dfrac{1}{3}\)
Correct
\(\dfrac{2}{3}\)
\(\dfrac{16}{19}\)
\(\dfrac{2}{5}\)
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