Answer:
45
Step-by-step explanation:
The mean is calculated as
mean =
Given the mean of 8 numbers is 41 , then
= 41 ( multiply both sides by 8 )
sum of 8 numbers = 328
Given the mean of 2 numbers is 29 , then
= 29 ( multiply both sides by 2 )
sum of 2 numbers = 58
The sum of the remaining 6 numbers = 328 - 58 = 270 , so
mean = = 45
The mean of the other 6 numbers = 45
Isaac drove the car at 44 mph during last three hours.
Step-by-step explanation:
Average speed = 49 miles per hour
Let,
s be the speed during last three hours
4s-172 be the speed during first three hours
Average =
Dividing both sides by 5
Speed during last three hours = 54 mph
Speed during first three hours = 4(54)-172 = 44 mph
Isaac drove the car at 44 mph during last three hours.
Keywords: division, addition
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