Which is correct: '9 and 6 is 14' or '9 and 6 are 14'?

Question

Find the 3 digit code using the clues given below :

7 2 6 - One number is correct and well placed
3 2 9 - One number is correct but wrong placed
6 5 3 - One number is correct and well placed
9 4 8 - One number is correct but wrong placed

Answer 1

9 and 6 are 15 is correct