400 people are asked if they drink tea. To say Yes and 20% of the people who say Yes drink at least 3 cups each day.
a) Complete the frequency tree.
Drink tea
At least 3 cups
each day
b) What fraction of the 400 people
drink at least 3 cups of tea
each day?
Give your answer in its simplest
form.
​

After reading 80% of her e-mails in her inbox, danette still has m unread e-mails. which of the following expressions could represent the number of e-mails danette had in her inbox before she started reading? choose 2 answers: (choice a) 5m (choice b) 1.8m (choice c) 80m (choice d) m/0.8 (choice e) m/1−0.8