Sanchia

what are rational and irrational numbers?? i know that irrational numbers are numbers that cannot be expressed as a fraction, but i'm still confused. there is this question: which of the following are irrational numbers: √2, √8, 22/7, pi, 2√3 i know that...

This is the question, but i get the wrong answer. In a theatre, 1/5 of the audience were under the age of 50 and 1/4 of the audience were over 75. What fraction of the whole audience were between 50 and 75 inclusive. I simply used 1 - 1/5 - 1/4 = 11/20 bu...