find the probability in a group of 10 students sitting in a row , two of them always sit next to each other
assume that these 2 students are 1 and then u can sit is 9 ! and these 2 students can sit by 2 ways then total ways are 9 ! * 2 and the probability is 9 ! * 2 / 10 ! = 1 / 5 = 0.2 answer : d
divide(multiply(factorial(subtract(10, const_1)), factorial(const_2)), factorial(10))