Tourists in France have 9 tourist destinations they want to visit but only have time for 6. How many different routes can they take to see six of the nine sites?
Answer:
60480
Explanation:
Recall ;
nPr = n! ÷ (n - r)!
9P6 = 9! ÷ 3!
9P6 = (9*8*7*6*5*4*3!) / 3!
9P6 = 9*8*7*6*5*4
9P6 = 60480
Mention the major causes of water pollution in a city
Answer:
Industrial Waste. ...
Sewage and Wastewater. ...
Mining Activities. ...
Marine Dumping. ...
Accidental Oil Leakage. ...
The burning of fossil fuels. ...
Chemical fertilizers and pesticides. ...
Leakage From Sewer Lines.