Carly wants to buy 10 litres of paint and only wants to go to one shop to buy it. Home Stores sells 2 / tins of paint for £4.80 each.
Paint Supplies sells 1 / tins of paint for £3.20 each and it's 3 for 2.
The DIY shop sells 2.5 /tins of paint for £7.80 each, and it's buy 3 get 1 free.
What is the cost of getting 10 litres from each shop?
Write down where Carly should buy her paint from in the comment box.

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.