Answer:
-7
Step-by-step explanation:
-2 - 5 = -7
Answer:
20% of students earned a D
Step-by-step explanation:
I assumed that
17 earned A
14 earned B
4 earned C
9 earned D
Answer:
Expected winnings for one spin = 0.1
Step-by-step explanation:
Expected Value = Sum of [(Probability of X)(Value of X)]
E(X) = Σ [P(X).X]
Two Events : X = +68 , P(X) = 1/38 and X = -2 , P(X) = 37/38
E(X) = [(68) (1/38)] + [(-2)(37/38)]
[(68)(0.03)] + [(-2)(0.97)]
= 2.04 - 1.94
= 0.1
Answer:
i don't know
Step-by-step explanation:
