Maths Pros - Help

[Blondie1984]

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?!

I am definitely not a maths pro but if I answer and am wrong, at least it might bump this and someone who knows better can answer!

It's a weighted average you're looking for. So first you need to get all the visits into the same terms, so visits per year.
5% visit 365 per year
10% visit 52 times per year
20% visit 12 times per year
50% visit 4 times per year
15% visit 1 per year

Then you multiply each percentage by the number of times that percentage visits so

0.05 x 365
0.1 x 52

etc (because 0.05 is the same as 5 percent, or 5/100 etc)

Then you add all the answers up. I get 28 as the answer.

Assume there are 100 people.

5 people visit 365 times a year = 1825 visits
10 visit 52 times = 520 visits
20 visit 12 times - 240 visits
50 visit 4 times = 200 visits
15 visit once = 15 visits.

Add up the total number of visits = 2800 visits. Divide by the number of people (100) = 28 visits a year.

I think...

God I hate maths....

What stage is your niece at ? Just interested.

If you can understand %, don't even bother helping you may end up confusing her even more. Better stay away than try to help.
% means out of 100. So, 5 % means 5/100.
If you know that, everything is not complicated.

*can't understand

Just popping on to say I agree with the methods of the first posters.
(I love maths & have a maths degree).

This kind of thing comes up at GCSE.