Answer:
E because he is 9/16 standard deviations away from the mean, which is an improvement from 1/10 standard deviations
Hope this helped and brainliest please
We can convert 20km to 20,000m. Then, we can subtract 800m (walking distance) from 20,000m which would result in 19,200m. Then we can put 19,200m and 20,000m as a fraction (19200/20000). Before we can multiply it by 100 to make it in the percentage form, we can get rid of 2 zeroes for both number making it 192/200 and then further simplifying it to 24/25 by dividing both numbers by 8. Finally to get the percentage we can multiply 24 and 100 (2400) and then divide the result (2400) by 25. The final answer is 2400/25=96 meaning he cycled 96% of the journey and walked 4% of the journey (100-96=4).
Let us consider that Christopher is 'x' years old
Age of Christopher = x
George is 8 years more than Christopher
Age of George = (x + 8)
Ford is 2 years younger than Christopher
Age of Ford = (x - 2)
Now the sum of their ages is 60
∴ x + (x + 8) + (x - 2) = 60
3x + 6 = 60
3x = 60 - 6
3x = 54
x = 54 ÷ 3
x = 18
Age of Christopher = x = 18 years
Age of George = (x + 8) = 18 + 8 = 26 years
Age of Ford = (x - 2) = 18 - 2 = 16 years
The sum of all their ages = 18 + 26 + 16 = 60 years
Answer:
24
Step-by-step explanation:
25%= 1/4 of the class
1/4 *x=6
x=24
