Arithmetic: Solve (n+1, 2) = (n, 1) + 4(7, 1)

[reggiwilliams]

Came across this question in past exam paper and not certain under what subject this type of question comes under
Can someone help and steer in right direction

 

[khansaheb]

Came across this question in past exam paper and not certain under what subject this type of question comes under
Can someone help and steer in right direction

If I were to solve this problem, I would first convert each expression as "combination"/"permutation" - and simplify by division
Have you done that?

 

[reggiwilliams]

After quick revision of probability and combinations came up with this solution which I think is right
Please confirm

 

[blamocur]

Looks good to me.