1) The ratio of desktop computers sold to the number of laptops sold by Sharaf DG outlet for this month is 5:9, If 15 desktop computers sold for this month then how many laptops, were sold?

The answer is 27 laptops.

Step-by-step explanation:

To get 15 desktop computers you would need to multiply the 5 desktops by 3. So you would do the same for the laptops, the 9 laptops multiplied by 3 gives you 27 laptops.

The records of a computer retail store show that out of the 25

customers who purchased a desktop computer last month, 17

also purchased a service plan that extends the warranty for an extra year. Out of the 100

customers who purchased a notebook computer last month, 78

purchased the same service plan