There are 7 times as many males as females on the maths course at university. What fraction of the course are female?
Give your answer in its simplest form.

The ratio of two numbers is 5 to 4. the sum of the numbers is 99. what number is the greater of the two numbers?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

Describe a situation that you could represent with the inequality x< 17