Answer:
Step-by-step explanation:
Given that X is binomial with n = 13 and p = 0.30
Pdf of x is
f(x) =
a) f(0) = P(x=0)
=0.00969
= 0.01
b) f(12) =
4.83(10^-6) ~0.00
c)
X =126 because if you multiply 9 and 14 you get 126 and 126 divided by 9 is 14
52,000$ because 52,000 is 2/3 of 72,000 and 12 is 2/3 of 18
7x + 3y = 30
-2x + 3y = 3....multiply by -1
-----------------
7x + 3y = 30
2x- 3y = -3 (result of multiplying by -1)
----------------add
9x = 27
x = 27/9
x = 3
7x + 3y = 30
7(3) + 3y = 30
21 + 3y = 30
3y = 30 - 21
3y = 9
y = 9/3
y = 3
solution is (3,3)