90% of the tickets sold at an amusement park were discount tickets. If the park sold 90 tickets in all, how many discount tickets did it sell?

90

Step-by-step explanation:

90

Step-by-step explanation:

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

the first one

step-by-step explanation:

just id the test.