The set given by the project grade is {1, 2, 3, 4, 5}. If the random variable, X, is the project grade, the mean of the probability distribution is determined by:
Sum = 1 + 2 + 3 + 4 +5
= 15
Mean of the probability distribution is 15/n, where n = 5
= 15/ 5
= 3
-4 -2 = -4 + (-2) = -6
As you see here, -6 does not equal 46, therefore, this equation has no solution.
-6 ≠ 46
Final answer:- No solution to this equation.
15
63 x 5 = 315
315/20 = 15.75
hence, 15 $20 bills
B is false, since by the inclusion/exclusion principle,
By independence, we have 
, which is zero if either of 
or 
is 0, which isn't guaranteed.
