객관식How many options are there for license plates with any three letters (A-Z) followed by any 3 numbers (0-9)?692views
객관식Phone numbers are 10 digits long. How many possible phone numbers are there if the 1st and 4th numbers can't be 0?733views1rank
객관식A student formed a club at their school. They have 13 members, and need to elect a president, vice president, and treasurer. How many ways are there to fill these officer positions?675views1rank
객관식Emily is organizing her closet. She has 15 shirts left to hang but has space in one section for 6 shirts. How many ways could she hang shirts in that section?582views