Guests in each hostel room 10
8
6
Number of hostel rooms
2
0-3
8-11
4-7
16-19
12-15 20-23
Number of guests

How many hostel rooms are there?
rooms

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