Expected value of the bet is
the sum of the products of value of outcome and its probability,
less the amount paid to place the bet.
Outcomes value probability
win 225 1/4
lose 0 3/4
cost of bet = 40
So expected value of bet
E[X]=225*(1/4)+0*(3/4)-40
=56.25-40
=16.25
This means that in the long run, gambler will win, since the expected value is positive. (does NOT mean she will win in the next bet!)
I think the answer is 17 because the pattern adds 4 then takes away 1 so 14-1=13 13+4=17
C because 180-230 would be negative b as well as three quarters of seven
(3+x)+x=10.5
Simplify
2x = 7.5
x = 3.75
Plug in for x
(3 + 3.75) + 3.75 = 10.5
6.75 + 3.75 = 10.5
The heavier packet of fruit is 6.75 kg.
