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Answer:
192
Step-by-step explanation:
to find the mean you have to use this formula: mean= N(total number of trials) times P( probability of "success")
n=640
p=0.3
640x0.3= 192
Answer:
192 km
Step-by-step explanation:
Lets find the speed the train moves with in one hour
speed = distance/time
speed = 80 4/5 /1
speed = 80 4/5 km/hr
Now, lets find how much distance it will cover in 4 3/4 hours
distance = speed * time
distance = 80 4/5 * 4 3/4
distance = 192 km
