I'm trying to help my niece with her homework and one of the questions has me utterly fuddled so was hoping someone on here might be able to help
She needs to work out what the average yearly frequency of visit is for a group where:
5% of people visit every day
10% of people visit once a week
20% of people visit once a month
50% of people visit once every 3 months
15% of people visit once a year
Help....where do I even start?!