A choir teacher is dividing 18 sopranos and 14 altos into singing groups. He wants each group to have the same combination of sopranos and altos, with no singers left over. What is the greatest number of groups he can make?

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).

Which strategy is used by public health to reduce the incidence of food poisoning?