If harriet rolls the number cube 39 times how many times can she expect to roll a 3 or 4?

Two out of thirty nine hope this helped 

There are 6 possibilites in total as there are 6 numbers. Numbers 3 and 4 would be on the number cube once each therefore the fraction in 2/6. To work out how many times 3 or 4 would be rolled you need to do 2/6 of 39 which is 10. Your answer should be 10... I think... Hope I helped. :P