1 Communiquer en anglais Calculer-Communiquer In a survey, Wendy asked forty of her friends how many foreign countries they had visited. Here are her results. Number Number of Mid-Interval nxm of countries friends (n) value (m) O to 2 3 1 3 to 5 6 4 6 to 8 10 9 to 11 15 12 to 14 5 15 to 17 1 a. Copy out and complete the table. b.Work out an estimate for the mean number of countries visited by the 40 people.
