Need help with math

posted by .

In a survey of 250 households regarding the ownership of desktop and laptop computers, the following information was obtained: ​
130 households own only desktop computers. 30 households own only laptop computers.
50 households own neither desktop nor laptop computers. ​

How many households own both desktop and laptop computers?

Please help. thank you ​

  • Need help with math -

    people who own both (b) will be counted in both groups (laptop owners and desktop owners)

    when you count all of the households, the "both" group is only counted once

    130 + 30 + 50 + b = 250

  • Need help with math -

    Scott is correct :3

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. business statistics

    It has been reported that 10.3% of U.S. households do not own a vehicle, with 34.2% owning 2 vehicles, and 17.1% owning 3 or more vehicles. The data for a random sample of 100 households in a resort community are summarized in the …
  2. business statistics

    It has been reported that 10.3% of U.S. households do not own a vehicle, with 34.2% owning 2 vehicles, and 17.1% owning 3 or more vehicles. The data for a random sample of 100 households in a resort community are summarized in the …
  3. Algebra

    I need help solving these three problems. 1/4(7 + 3g) + -g/8 Twice the greater of two consecutive odd integers is 13 less than three times the lesser number. Find the integers. About 4.9 million households had one brand of personal …
  4. Marketing

    The manager of the aluminum recycling division of Environmental Services wants a survey which will tell him how many households in the city of Seattle, Washington, will voluntarily wash out, store, and then transport all of their aluminum …
  5. Math

    A random survey of 500 households determines that 20% of the households would do so and that each participating household expects to recycle about 100 cans monthly with a standard deviation of 30 cans. Question (a) What is the 95% …
  6. statitics

    Approximately 40% of all U.S. households own at least one dog (according to the humane society). Suppose 15 households are randomly selected for a pet ownership survey. a. What is the probability that exactly eight of the households …
  7. Algebra

    Pauline sells computers on commission. She spends 2 hours on selling a laptop and 1 hour on selling a desktop computer. She works no more than 40 hours per week and routinely sells at least 1 laptop and at least 4 desktops each week. …
  8. MATHS

    In Homestead, 2/5 of the households own pets. Of the households with pets, 1/3 have cats. What fraction of the households in Homestead own cats?
  9. Math

    In a survey of 380 households regarding the ownership of VCRs and DVD players, the following data was obtained: ​ 350 households own one or more VCRs. ​180 households own one or more VCRs and one or more DVD players. ​13 …
  10. Math

    In 2016 there were ab out 135 million households in the United States. 36.5% of the households own at least one dog. On average, these households have 1.6 dogs. How many millions of pet dogs were in the United States. Round to the …

More Similar Questions