Apolling organizations wants to sample the opinions of low-, medium-, and high-income people.

which sampling strategy is best suited for this purpose?

a.
convenience

b.
simple random

c.
stratified random

d.
systematic

Empty box + box + empty box fill in the box is equal to 30 how

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?