Answer:
a) 25/324
b) 1/4
c) 1/3
Step-by-step explanation:
a) [⅓A + ⅓B]² = (⅓)²[A + B]²
= (1/9) [½ + ⅓]²
= (1/9)(⅚)²
= (1/9)(25/36)
= 25/324
b) ½ × ½ = ¼
c) (½ × ⅓) + (⅓ × ½) = 2 × ⅙ = ⅓
Answer:
0.0009
Step-by-step explanation:


n = 8
This is the left tailed test .
The null and alternative hypothesis is ,


Test statistic = z=-3.12 from the table.
P(z <-3.12 ) = 0.0009
P-value =0.0009
Okay so the value of X is 9x^2/7
Well you can just keep adding 55 =1hr until you get to 400 the same with 45
25 * 16 = 400 tickets were sold
400 * $15 = $6000 was raised