Probability from two-way tables Problem set A Answers

1. (a) \(\frac{23}{100}=0.23\)
2. (b) \(\frac{13}{25}=0.52\)

1. (a) \(\frac{1}{5}=0.2\)
2. (b) \(\frac{23}{36}\)

1. (a) \(\frac{5}{8}=0.625\)
2. (b) \(\frac{28}{85}\)

\(\frac{3}{5}=0.6\)

1. (a) k = 20
2. (b) \(\frac{3}{8}=0.375\)
3. (c) \(\frac{17}{60}\)

1. (a) \(\frac{11}{15}\)
2. (b) \(\frac{34}{55}\)

1. (a) Passed, Did not revise: 13; Failed, Revised: 25; Failed, Did not revise: 17
2. (b) \(\frac{13}{120}\)
3. (c) \(\frac{5}{18}\)