Mutually exclusive means that the intersection of the events is empty: P(S and T) = 0.
P(S or T) = P(S) + P(T) = 29% + 49% = 78%
If events S, T are not mutually exclusive, then P(S or T) = P(S) + P(T) - P(S and T)
2 4/10 = 2.4
hope this helped
Answer:
#1 The balance after 21 months is $9960.
#2 $1,360
#3 The total cost of boring the 750 meters is $37,700.
