In how many ways can the six letters of the word "mammal" be arranged in a row?	Choose the correct choice from the following options.
A) 20	B) 40	C) 31	D) 60	E) 64
Since there are 3 "m"s , 2 "a"s and 1 "l" in the word "mammal", we have:   (3+2+1)! / (3! * 2! * 1!)=60   ​Ans-60
<result>D</result>
In how many ways can the six letters of the word "mammal" be arranged in a row?