Christine is participating in a 4-day cross-country biking challenge. She biked for 66 ,62 ,47 and miles on the first three days. How many miles does she need to bike on the last day so that her average (mean) is 60 miles per day

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.

Name the most appropriate metric unit for each measurement like a length of an carrot

Three coins are flipped. what is the probability that there will be at least two tails?