If 3n is an even number which of the following is odd number 3n-1 3n-2 3n+2n 3n+2

Option A is correct!

Step-by-step explanation:

Since 3n is even number and we know that previous and next number of an even is always an odd number

here the first option is 3n-1 which means one less than 3n that means the number previous to 3n so it is odd.

3n-2 means 2 number lesser than 3n which is again even number.

same argument will be given for 3n+2

2n means even number because n is multiple of 2

sum of two even is again even therefore 32n is again even.

So, Let's call N two (for an example). Since two is an even number, but we could really put any even number.

3 (2) - 1 = 5 (ODD)

(3) 2-2 = 4 (EVEN)

3 (2) + 2 (2) = 10 (EVEN)

3 (2) + 2 = 8 (EVEN)

The answer is bolded