in conjunction with: together with
go on sale: become available in
the shops
draw: anything taken or chosen
at random; in this case - the result of a specific lottery outcome
('the lucky numbers')
a commercial broadcaster: a radio
or TV station that is paid for by the transmitting of advertisements
in their air time
jackpot: the top prize paid out for any lottery game
estimated at: if you estimate an
amount or a quantity, you calculate or predict it approximately
the average: here - the total amount
of money divided by the total number of draws
rollovers: when a jackpot is not
won it is added, or 'rolled over', to the next draw's jackpot,
increasing the prize payment until the jackpot is finally won
have stabilised: are not likely
to change suddenly
decline: growing smaller; here
- decrease in sales