Qand r are independent events. if p(q)=1/4 and p(r)=1/5, find p(q and r).

Twenty-five percent of the customers entering a grocery store between 5 p. m. and 7 p. m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

Describe the domain and range of y=2(3)^x-2+5