4-(

)+111
=4-(4)+111
=111 since 4 and -4 cancel each other out
Chicken - $8
Duck - $5
Work:
50c+30d=550
44c+36d=532
Median is the middle number. To find median, the numbers must be ordered from least to greatest. The numbers are already ordered.

The middle numbers are 36 and 55, with 2 numbers on each side.
a, b, c, d, e, f
Add the 2 numbers and divide by 2

Now divide by 2

The median is 45.5
How many friends are their without the number of friends you cant answer it so the answer is unknown
Answer:
P(A) = 0.1620 , P(A|B) = 0.0707
Step-by-step explanation:
Total people = 10 + 15 + 20 = 45 , Sophomores = 10, Juniors = 15 , Seniors = 20
P(A) , exactly 3 juniors selected = (15 c 3) (30 c 2) / (45 c 5) = (455 x 435) / 1221759 = 0.1620
P (B) , exactly 2 seniors selected = (20 c 2) (25 c 3) / (45 c 5) = (190 x 2300)/ 1221759 = 0.3576
P(A|B), exactly 3 juniors & exactly 2 seniors selected = P (A∩B) / P (B)
(15 c 3) (20 c 2) / (45 c 5) = (455 x 190) / 1221759 = 0.0707