laying number of goals question

[si2525]

Hi everyone

basically I have a simple question,how on betfair do you lay a certain amount of goals in a game?,so if I dont think 2 goals in total wont be scored what is the best way of doing this?

[lcredd]

You could either: back 'under 1.5 goals' or lay 'over 1.5 goals.'

[si2525]

i want to lay an exact score lets say for a £10 profit or risking say 5% of my bankroll,do I place a bet on the under 1.5 and over 1.5 goals at the same time and how much do I need to put either side,lets say the odds for under 1.5 was 1.9 and over 1.5 was 2.0 how much do i place on either bet to have a lay bet