A electrical goods retail warehouse concludes from a customer survey that 40% of customers who seek advice from the sales staff buy an appliance and that 20% of those entering the warehouse who do not seek such advice buy an appliance. If 30% of all customers entering the warehouse seek advice, what is the probability that a customer entering the warehouse buys an appliance.?

Let denote the number of customers.

The number of customers that seek advice is .

The number of customers that do not seek advice is thusly

40% of the customers that do seek advice buy a device, denoted with that is 12% of the total customers here buy a device.

20% of the customers that do not seek advice buy a device, denoted with so 14% of the total customers here buy a device.

Together, the percentage of customers that will buy an applicance on the end of the day is .

So the probability from that follows that when a customer enters the shop there exists a 26% probability that the customer will end up buying a device.

Hope this helps :)

hi, i am not sure about this one but i think its d,

hope this !

to find the unit price, we must figure out the cost of one item (in this case one dish towel).   to do this, we divide the total price ($7.92) by the number of items bought (for this problem it is 8, because there are eight dish towels in one pack).  

$7.92/8 = $0.99

therefore, the unit price, or the price of one dish towel, is $0.99.

hope this !