Katrina is following a pattern for a mosaic. The pattern calls for 20 red tiles and 50 blue tiles. When Katrina made the mosaic, she used 42 red tiles and 105 blue tiles. Did Katrina use the correct ratio
of red tiles to blue tiles? Explain.

Atown recently dismissed 5 employees in order to meet their new budget reductions. the town had 5 employees over 50 years of age and 19 under 50. if the dismissed employees were selected at random, what is the probability that exactly 2 employees were over 50? express your answer as a fraction or a decimal number rounded to four decimal places.