Can you please help me I’m not a 100% sure how to do this

1/400

Step-by-step explanation:

Decimals are the number over how every many places the number is.

The number shown is 25.  It goes out to the ten thousandths place.  This means that you have to place 25 over 10,000 and simplify the fraction.

25/10,000 = 1/400

b) well because you get well

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