Asushi restaurant makes 12 types of sushi rolls each day. they also offer 7 sashimi plates. a popular combination platter at the restaurant allows the customer to choose 2 different types of rolls and 2 different types of sashimi plates.

1386 possible combinations

Step-by-step explanation:

A sushi restaurant makes 12 types of sushi rolls each day. They also offer 7 sashimi plates. A popular combination platter at the restaurant allows the customer to choose 2 different types of rolls and 2 different types of sashimi plates. What is the number of possible combination that can be made.

12 types sushi roll - can choose 2

7 types of  sashimi - can choose 2

2 different types of rolls and 2 different types of sashimi

C₁₂,₂ * C₇,₂ = 66*21 = 1386

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

probability for j is 1/4

while

a is 1/6