How many backpacks contain two three writing instruments

Reference no: EM13140379

Upon examining the contents of 38 backpacks, it was found that 23 contained a black pen, 27 contained a blue pen, and 21 contained a pencil, 15 contained both a black pen and a blue pen, 12 contained both a black pen and a pencil, 18 contained both a blue pen and a pencil, and 10 contained all three items. How many backpacks contained exactly two of the three writing instruments?

Reference no: EM13140379

Questions Cloud

Elements of hinduism-confucianism and buddhism : Given the classification of Hinduism, Confucianism, and Buddhism as world religions in Eastern culture, can you help me to identify the primary elements of each religion and identify the elements that they have in common which render them "Eastern..

Religion negative views of nature : Environmentally speaking, how might nature have been negatively viewed by some religions? What are some of the reasons nature is being viewed differently today? Thoughts?

What is the molarity of hcl : what is the molarity of HCl in a solution prepaired by dissolving 18.25 gm HCl in 200 gm ethanol, if the density of solution is 0.86 gm per mm

Which types of genetic effects associated with variance : Which types of genetic effects are associated with interactive variance?

How many backpacks contain two three writing instruments : 18 contained both a blue pen and a pencil, and 10 contained all three items. How many backpacks contained exactly two of the three writing instruments?

Role of religion in america-generational differences : What are the current generational differences in attitudes toward the role of religion in America?

What is the concentration (m) of ch3oh in a solution : What is the concentration (M) of CH3OH in a solution prepared by dissolving 16.8 g of CH3OH in sufficient water to give exactly 230 mL of solution?

What does narrow sense heritability estimate : What does narrow sense heritability (h2) estimate? a. The proportion of phenotypic variation that is due to total genetic variance b. The proportion of phenotypic variation that is due to interactive variance.

Calculations of cost per equivalent unit : Determine the denominators to be used in the calculations of cost per equivalent unit for materials and conversion costs.

User Account

All Pages