Question on: JAMB Mathematics - 2007
a senatorial candidate had planned to visit seven cities prior to a primary election. However, he could only visit four of the cities. How many different itineraries could be considered?
A
840
B
720
C
640
D
520
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Correct Option: A
No of ways = (^{7}P_{4})
= 7 x 6 x 5 x 4
= 840
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