There are 30 students in mrs. woodward’s class, and 1/2 of the class has their own cellphone. of this group of students, 1/3 of them are allowed to use social media. how many of the students have a cellphone and can use social media?

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236