9. a) Two numbers are in the ratio of 5:7. When 3 is added to each number, the ratio becomes 3:4. Find the numbers.
would 15​

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

answer for #1 is c

answer for #2 is d

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