SOLUTION: Your class is electing a president and vice president. How many ways can a president and vice president be selected from 25? 300 150 600 50

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Question 732500: Your class is electing a president and vice president. How many ways can a president and vice president be selected from 25?
300
150
600
50

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
here you need to use combinations, the items do not have to be in any particular order, just rearrange them in the same sequence

nCr=n%21%2F%28n-r%29%21r%21

25C2=25%21%2F%2825-2%29%212%21

25C2=25%21%2F%2823%212%21%29





25C2=%2825%2Across%2824%2912%29%2F%28cross%282%291%29

25C2=25%2A12

25C2=300

so, your answer is 300