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How many factors does 1155 have that are divisible by 3? |
Answer» Solution :![]() `:.`In order to be a factor of 1155 divisible by 3, we have to choose one or TWO of 5,7,11 along with 3 or 3 ALONE. `:." The NUMBER of ways." = ""^3C_1+ ""^3C_2 + ""^3C_0 =2^3-1 =7` ` :.' The number of FACTORS is 7 excluding 1155 itself. |
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