Which addition expression is equal to 4 times one-fifth? One-ninth plus one-ninth plus one-ninth plus one-ninth
One-fifth plus one-fifth plus one-fifth plus one-fifth
Four-ninths plus four-ninths plus four-ninths plus four-ninths
Four-fifths plus four-fifths plus four-fifths plus four-fifths

One-fifth plus one-fifth plus one-fifth plus one-fifth

Step-by-step explanation:

1/5 + 1/5 + 1/5 + 1/5 = 4/5 = 4 x 1/5

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

n

step-by-step explanation: