P(A or B) = P(A) + P(B)
if u have a dice and want to roll 1 or 2
P(1) = 1/6
P(2) = 1/6
P(1 or 2) = 1/6 + 1/6 = 2/6 = 1/3
Speed=distance/time
9:05 to 12:25 is 3 hours and 20 mins so 3 1/3 hours and the distance is 250
250/3 1/3=75km/h
Answer: if you’re saying she received 75 calls the first evening then she would have received 10 more then that which is 85 on the third evening and 85x3 = 255 on the second evening.
So first evening 75
Second evening 255
Third evening 85
