4 out of 24 reduced to 1 out of 6 since there are 24 total buttons and 4 are blue. About 16.67%
Because each ticket costs 1 and she spends 8 she would be buying 8 tickets
She has 8 friends so each one would get 1 ticket
The answer is 1
A = 1/2 (b x h)
A = 1/2(12.5 x 2.4)
A = 1/2(30)
A = 15